diff --git a/ISSUE_TEMPLATE.md b/ISSUE_TEMPLATE.md
new file mode 100644
index 00000000..b1ddccb1
--- /dev/null
+++ b/ISSUE_TEMPLATE.md
@@ -0,0 +1,13 @@
+*Requisite minimal reproducible example, formatted as plain text :*
+
+<hr>
+
+#### Optional: concerning jsx.
+PLEASE PLEASE PLEASE make sure you have properly
+setup and are sourcing this plugin https://github.com/mxw/vim-jsx
+
+WE DO NOT support JSX automatically, you need another plugin to add get this
+functionality.
+
+Make sure the bug still exists if you disable all other javascript plugins
+except the one noted above, mxw/vim-jsx
diff --git a/README.md b/README.md
index b2e3269c..81accf8c 100644
--- a/README.md
+++ b/README.md
@@ -1,82 +1,127 @@
-# vim-javascript v0.9.0
+# vim-javascript
 
-JavaScript bundle for vim, this bundle provides syntax and indent plugins.
+JavaScript bundle for vim, this bundle provides syntax highlighting and
+improved indentation.
 
-## A Quick Note on Regexes
 
-Vim 7.4 was released recently, and unfortunately broke how this plugin
-handles regexes. There was no real easy way for us to fix this unless we
-completely rewrote how regexes work.
+## Installation
+
+### Install with native package manager
+
+      git clone https://github.com/pangloss/vim-javascript.git ~/.vim/pack/vim-javascript/start/vim-javascript
+
+since Vim 8.
+
+### Install with [pathogen](https://github.com/tpope/vim-pathogen)
+
+      git clone https://github.com/pangloss/vim-javascript.git ~/.vim/bundle/vim-javascript
+
+alternatively, use a package manager like [vim-plug](https://github.com/junegunn/vim-plug)
 
-Good News: There was a recent update to Vim 7.4 that fixes this issue.
 
-Make sure you are at least using Vim 7.4, with patches 1-7.
+## Configuration Variables
 
-If you are stuck on an older version of Vim 7.4 with no way to update,
-then simply perform the following commands to fix your current buffer:
+The following variables control certain syntax highlighting plugins. You can
+add them to your `.vimrc` to enable their features.
+
+-----------------
 
 ```
-:set regexpengine=1
-:syntax enable
+let g:javascript_plugin_jsdoc = 1
 ```
 
-## Installation
+Enables syntax highlighting for [JSDocs](http://usejsdoc.org/).
+
+Default Value: 0
+
+-----------------
+
+```
+let g:javascript_plugin_ngdoc = 1
+```
 
-- Install with [Vundle](https://github.com/gmarik/vundle)
+Enables some additional syntax highlighting for NGDocs. Requires JSDoc plugin
+to be enabled as well.
 
-Add to vimrc:
+Default Value: 0
 
-    Bundle "pangloss/vim-javascript"
+-----------------
 
-And install it:
+```
+let g:javascript_plugin_flow = 1
+```
 
-    :so ~/.vimrc
-    :BundleInstall
+Enables syntax highlighting for [Flow](https://flowtype.org/).
 
-- Install with [pathogen](https://github.com/tpope/vim-pathogen)
+Default Value: 0
 
-    cd ~/.vim/bundle
-    git clone https://github.com/pangloss/vim-javascript.git
+-----------------
 
-## Configuration
+```vim
+augroup javascript_folding
+    au!
+    au FileType javascript setlocal foldmethod=syntax
+augroup END
+```
 
-The following variables control certain syntax highlighting features. You can
-add them to your `.vimrc` to enable/disable their features.
+Enables code folding for javascript based on our syntax file.
 
-#### javascript_enable_domhtmlcss
+Please note this can have a dramatic effect on performance. In some terminals
+this may cause hangs during pasting. If you are affected by this, using
+a different foldmethod (such as indent) may provide a better experience.
 
-Enables HTML/CSS syntax highlighting in your JavaScript file.
 
-Default Value: 0
+## Concealing Characters
 
-#### b:javascript_fold
+You can customize concealing characters, if your font provides the glyph you want, by defining one or more of the following
+variables:
 
-Enables JavaScript code folding.
+    let g:javascript_conceal_function             = "ƒ"
+    let g:javascript_conceal_null                 = "ø"
+    let g:javascript_conceal_this                 = "@"
+    let g:javascript_conceal_return               = "⇚"
+    let g:javascript_conceal_undefined            = "¿"
+    let g:javascript_conceal_NaN                  = "ℕ"
+    let g:javascript_conceal_prototype            = "¶"
+    let g:javascript_conceal_static               = "•"
+    let g:javascript_conceal_super                = "Ω"
+    let g:javascript_conceal_arrow_function       = "⇒"
+    let g:javascript_conceal_noarg_arrow_function = "🞅"
+    let g:javascript_conceal_underscore_arrow_function = "🞅"
 
-Default Value: 1
 
-#### g:javascript_conceal
+You can enable concealing within VIM with:
 
-Enables concealing characters. For example, `function` is replaced with `ƒ`
+    set conceallevel=1
 
-Default Value: 0
+OR if you wish to toggle concealing you may wish to bind a command such as the following which will map `<LEADER>l` (leader is usually the `\` key) to toggling conceal mode:
 
-#### javascript_ignore_javaScriptdoc
+    map <leader>l :exec &conceallevel ? "set conceallevel=0" : "set conceallevel=1"<CR>
 
-Disables JSDoc syntax highlighting
 
-Default Value: 0
+## Indentation Specific
+
+* `:h cino-:`
+* `:h cino-=`
+* `:h cino-star`
+* `:h cino-(`
+* `:h cino-w`
+* `:h cino-W`
+* `:h cino-U`
+* `:h cino-m`
+* `:h cino-M`
+* `:h 'indentkeys'`
 
 ## Contributing
 
-This project uses the [git
-flow](http://nvie.com/posts/a-successful-git-branching-model/) model for
-development. There's [a handy git module for git
-flow](//github.com/nvie/gitflow). If you'd like to be added as a contributor,
-the price of admission is 1 pull request. Please follow the general code style
+Please follow the general code style
 guides (read the code) and in your pull request explain the reason for the
-proposed change and how it is valuable.
+proposed change and how it is valuable. All p.r.'s will be reviewed by a
+maintainer(s) then, hopefully, merged.
+
+Thank you!
+
 
-## Bug report
+## License
 
-Report a bug on [GitHub Issues](https://github.com/pangloss/vim-javascript/issues).
+Distributed under the same terms as Vim itself. See `:help license`.
diff --git a/after/ftplugin/javascript.vim b/after/ftplugin/javascript.vim
new file mode 100644
index 00000000..c6c42d60
--- /dev/null
+++ b/after/ftplugin/javascript.vim
@@ -0,0 +1,12 @@
+" Vim filetype plugin file
+" Language:     JavaScript
+" Maintainer:   vim-javascript community
+" URL:          https://github.com/pangloss/vim-javascript
+
+setlocal iskeyword+=$ suffixesadd+=.js
+
+if exists('b:undo_ftplugin')
+  let b:undo_ftplugin .= ' | setlocal iskeyword< suffixesadd<'
+else
+  let b:undo_ftplugin = 'setlocal iskeyword< suffixesadd<'
+endif
diff --git a/compiler/eslint.vim b/compiler/eslint.vim
new file mode 100644
index 00000000..7695a072
--- /dev/null
+++ b/compiler/eslint.vim
@@ -0,0 +1,16 @@
+" Vim compiler plugin
+" Language:     JavaScript
+" Maintainer:   vim-javascript community
+" URL:          https://github.com/pangloss/vim-javascript
+
+if exists("current_compiler")
+  finish
+endif
+let current_compiler = "eslint"
+
+if exists(":CompilerSet") != 2
+  command! -nargs=* CompilerSet setlocal <args>
+endif
+
+CompilerSet makeprg=eslint\ -f\ compact\ %
+CompilerSet errorformat=%f:\ line\ %l\\,\ col\ %c\\,\ %m
diff --git a/extras/flow.vim b/extras/flow.vim
new file mode 100644
index 00000000..b34d7101
--- /dev/null
+++ b/extras/flow.vim
@@ -0,0 +1,109 @@
+syntax region  jsFlowDefinition     contained                        start=/:/    end=/\%(\s*[,=;)\n]\)\@=/ contains=@jsFlowCluster containedin=jsParen
+syntax region  jsFlowArgumentDef    contained                        start=/:/    end=/\%(\s*[,)]\|=>\@!\)\@=/ contains=@jsFlowCluster
+syntax region  jsFlowArray          contained matchgroup=jsFlowNoise start=/\[/   end=/\]/        contains=@jsFlowCluster,jsComment fold
+syntax region  jsFlowObject         contained matchgroup=jsFlowNoise start=/{/    end=/}/         contains=@jsFlowCluster,jsComment fold
+syntax region  jsFlowExactObject    contained matchgroup=jsFlowNoise start=/{|/   end=/|}/       contains=@jsFlowCluster,jsComment fold
+syntax region  jsFlowParens         contained matchgroup=jsFlowNoise start=/(/  end=/)/ contains=@jsFlowCluster nextgroup=jsFlowArrow skipwhite keepend extend fold
+syntax match   jsFlowNoise          contained /[:;,<>]/
+syntax keyword jsFlowType           contained boolean number string null void any mixed JSON array Function object array bool class
+syntax keyword jsFlowTypeof         contained typeof skipempty skipwhite nextgroup=jsFlowTypeCustom,jsFlowType
+syntax match   jsFlowTypeCustom     contained /[0-9a-zA-Z_.]*/ skipwhite skipempty nextgroup=jsFlowGeneric
+syntax region  jsFlowGeneric                  matchgroup=jsFlowNoise start=/\k\@<=</ end=/>/ contains=@jsFlowCluster containedin=@jsExpression,jsFlowDeclareBlock
+syntax region  jsFlowGeneric        contained matchgroup=jsFlowNoise start=/</ end=/>(\@=/ oneline contains=@jsFlowCluster containedin=@jsExpression,jsFlowDeclareBlock
+syntax region  jsFlowObjectGeneric  contained matchgroup=jsFlowNoise start=/\k\@<=</ end=/>/ contains=@jsFlowCluster nextgroup=jsFuncArgs
+syntax match   jsFlowArrow          contained /=>/ skipwhite skipempty nextgroup=jsFlowType,jsFlowTypeCustom,jsFlowParens
+syntax match   jsFlowObjectKey      contained /[0-9a-zA-Z_$?]*\(\s*:\)\@=/ contains=jsFunctionKey,jsFlowMaybe skipwhite skipempty nextgroup=jsObjectValue containedin=jsObject
+syntax match   jsFlowOrOperator     contained /|/ skipwhite skipempty nextgroup=@jsFlowCluster
+syntax keyword jsFlowImportType     contained type typeof skipwhite skipempty nextgroup=jsModuleAsterisk,jsModuleKeyword,jsModuleGroup
+syntax match   jsFlowWildcard       contained /*/
+
+syntax match   jsFlowReturn         contained /:\s*/ contains=jsFlowNoise skipwhite skipempty nextgroup=@jsFlowReturnCluster,jsFlowArrow,jsFlowReturnParens
+syntax region  jsFlowReturnObject   contained matchgroup=jsFlowNoise start=/{/    end=/}/  contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturnOrOp extend fold
+syntax region  jsFlowReturnArray    contained matchgroup=jsFlowNoise start=/\[/   end=/\]/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturnOrOp fold
+syntax region  jsFlowReturnParens   contained matchgroup=jsFlowNoise start=/(/    end=/)/  contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturnOrOp,jsFlowReturnArrow fold
+syntax match   jsFlowReturnArrow    contained /=>/ skipwhite skipempty nextgroup=@jsFlowReturnCluster
+syntax match   jsFlowReturnKeyword  contained /\k\+/ contains=jsFlowType,jsFlowTypeCustom skipwhite skipempty nextgroup=jsFlowReturnGroup,jsFuncBlock,jsFlowReturnOrOp,jsFlowReturnArray
+syntax match   jsFlowReturnMaybe    contained /?/ skipwhite skipempty nextgroup=jsFlowReturnKeyword,jsFlowReturnObject,jsFlowReturnParens
+syntax region  jsFlowReturnGroup    contained matchgroup=jsFlowNoise start=/</ end=/>/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturnOrOp
+syntax match   jsFlowReturnOrOp     contained /\s*|\s*/ skipwhite skipempty nextgroup=@jsFlowReturnCluster
+syntax match   jsFlowWildcardReturn contained /*/ skipwhite skipempty nextgroup=jsFuncBlock
+syntax keyword jsFlowTypeofReturn   contained typeof skipempty skipwhite nextgroup=@jsFlowReturnCluster
+
+syntax region  jsFlowFunctionGroup      contained matchgroup=jsFlowNoise start=/</ end=/>/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncArgs
+syntax region  jsFlowClassGroup         contained matchgroup=jsFlowNoise start=/</ end=/>/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsClassBlock
+syntax region  jsFlowClassFunctionGroup contained matchgroup=jsFlowNoise start=/</ end=/>/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncArgs
+syntax match   jsFlowObjectFuncName contained /\<\K\k*<\@=/ skipwhite skipempty nextgroup=jsFlowObjectGeneric containedin=jsObject
+
+syntax region  jsFlowTypeStatement                                   start=/\(opaque\s\+\)\?type\%(\s\+\k\)\@=/    end=/=\@=/ contains=jsFlowTypeOperator oneline skipwhite skipempty nextgroup=jsFlowTypeValue keepend
+syntax region  jsFlowTypeValue      contained     matchgroup=jsFlowNoise start=/=/ end=/\%(;\|\n\%(\s*|\)\@!\)/ contains=@jsFlowCluster,jsFlowGeneric,jsFlowMaybe
+syntax match   jsFlowTypeOperator   contained /=/ containedin=jsFlowTypeValue
+syntax match   jsFlowTypeOperator   contained /=/
+syntax keyword jsFlowTypeKeyword    contained type
+
+syntax keyword jsFlowDeclare                  declare skipwhite skipempty nextgroup=jsFlowTypeStatement,jsClassDefinition,jsStorageClass,jsFlowModule,jsFlowInterface
+syntax match   jsFlowClassProperty  contained /\<[0-9a-zA-Z_$]*\>:\@=/ skipwhite skipempty nextgroup=jsFlowClassDef containedin=jsClassBlock
+syntax region  jsFlowClassDef       contained start=/:/    end=/\%(\s*[,=;)\n]\)\@=/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsClassValue
+
+syntax region  jsFlowModule         contained start=/module/ end=/\%({\|:\)\@=/ skipempty skipwhite nextgroup=jsFlowDeclareBlock contains=jsString
+syntax region  jsFlowInterface      contained start=/interface/ end=/{\@=/ skipempty skipwhite nextgroup=jsFlowInterfaceBlock contains=@jsFlowCluster
+syntax region  jsFlowDeclareBlock   contained matchgroup=jsFlowNoise start=/{/ end=/}/ contains=jsFlowDeclare,jsFlowNoise fold
+
+syntax match   jsFlowMaybe          contained /?/
+syntax region  jsFlowInterfaceBlock contained matchgroup=jsFlowNoise start=/{/ end=/}/ contains=jsObjectKey,jsObjectKeyString,jsObjectKeyComputed,jsObjectSeparator,jsObjectFuncName,jsFlowObjectFuncName,jsObjectMethodType,jsGenerator,jsComment,jsObjectStringKey,jsSpreadExpression,jsFlowNoise,jsFlowParens,jsFlowGeneric keepend fold
+
+syntax region  jsFlowParenAnnotation contained start=/:/ end=/[,=)]\@=/ containedin=jsParen contains=@jsFlowCluster
+
+syntax cluster jsFlowReturnCluster            contains=jsFlowNoise,jsFlowReturnObject,jsFlowReturnArray,jsFlowReturnKeyword,jsFlowReturnGroup,jsFlowReturnMaybe,jsFlowReturnOrOp,jsFlowWildcardReturn,jsFlowReturnArrow,jsFlowTypeofReturn
+syntax cluster jsFlowCluster                  contains=jsFlowArray,jsFlowObject,jsFlowExactObject,jsFlowNoise,jsFlowTypeof,jsFlowType,jsFlowGeneric,jsFlowMaybe,jsFlowParens,jsFlowOrOperator,jsFlowWildcard
+
+if version >= 508 || !exists("did_javascript_syn_inits")
+  if version < 508
+    let did_javascript_syn_inits = 1
+    command -nargs=+ HiLink hi link <args>
+  else
+    command -nargs=+ HiLink hi def link <args>
+  endif
+  HiLink jsFlowDefinition         PreProc
+  HiLink jsFlowClassDef           jsFlowDefinition
+  HiLink jsFlowArgumentDef        jsFlowDefinition
+  HiLink jsFlowType               Type
+  HiLink jsFlowTypeCustom         PreProc
+  HiLink jsFlowTypeof             PreProc
+  HiLink jsFlowTypeofReturn       PreProc
+  HiLink jsFlowArray              PreProc
+  HiLink jsFlowObject             PreProc
+  HiLink jsFlowExactObject        PreProc
+  HiLink jsFlowParens             PreProc
+  HiLink jsFlowGeneric            PreProc
+  HiLink jsFlowObjectGeneric      jsFlowGeneric
+  HiLink jsFlowReturn             PreProc
+  HiLink jsFlowParenAnnotation    PreProc
+  HiLink jsFlowReturnObject       jsFlowReturn
+  HiLink jsFlowReturnArray        jsFlowArray
+  HiLink jsFlowReturnParens       jsFlowParens
+  HiLink jsFlowReturnGroup        jsFlowGeneric
+  HiLink jsFlowFunctionGroup      PreProc
+  HiLink jsFlowClassGroup         PreProc
+  HiLink jsFlowClassFunctionGroup PreProc
+  HiLink jsFlowArrow              PreProc
+  HiLink jsFlowReturnArrow        PreProc
+  HiLink jsFlowTypeStatement      PreProc
+  HiLink jsFlowTypeKeyword        PreProc
+  HiLink jsFlowTypeOperator       Operator
+  HiLink jsFlowMaybe              PreProc
+  HiLink jsFlowReturnMaybe        PreProc
+  HiLink jsFlowClassProperty      jsClassProperty
+  HiLink jsFlowDeclare            PreProc
+  HiLink jsFlowModule             PreProc
+  HiLink jsFlowInterface          PreProc
+  HiLink jsFlowNoise              Noise
+  HiLink jsFlowObjectKey          jsObjectKey
+  HiLink jsFlowOrOperator         jsOperator
+  HiLink jsFlowReturnOrOp         jsFlowOrOperator
+  HiLink jsFlowWildcard           PreProc
+  HiLink jsFlowWildcardReturn     PreProc
+  HiLink jsFlowImportType         PreProc
+  HiLink jsFlowTypeValue          PreProc
+  HiLink jsFlowObjectFuncName     jsObjectFuncName
+  delcommand HiLink
+endif
diff --git a/extras/jsdoc.vim b/extras/jsdoc.vim
new file mode 100644
index 00000000..a7189d1b
--- /dev/null
+++ b/extras/jsdoc.vim
@@ -0,0 +1,40 @@
+"" syntax coloring for javadoc comments (HTML)
+syntax region jsComment    matchgroup=jsComment start="/\*\s*"  end="\*/" contains=jsDocTags,jsCommentTodo,jsCvsTag,@jsHtml,@Spell fold
+
+" tags containing a param
+syntax match  jsDocTags         contained "@\(alias\|api\|augments\|borrows\|class\|constructs\|default\|defaultvalue\|emits\|exception\|exports\|extends\|fires\|kind\|link\|listens\|member\|member[oO]f\|mixes\|module\|name\|namespace\|requires\|template\|throws\|var\|variation\|version\)\>" skipwhite nextgroup=jsDocParam
+" tags containing type and param
+syntax match  jsDocTags         contained "@\(arg\|argument\|cfg\|param\|property\|prop\|typedef\)\>" skipwhite nextgroup=jsDocType
+" tags containing type but no param
+syntax match  jsDocTags         contained "@\(callback\|define\|enum\|external\|implements\|this\|type\|return\|returns\|yields\)\>" skipwhite nextgroup=jsDocTypeNoParam
+" tags containing references
+syntax match  jsDocTags         contained "@\(lends\|see\|tutorial\)\>" skipwhite nextgroup=jsDocSeeTag
+" other tags (no extra syntax)
+syntax match  jsDocTags         contained "@\(abstract\|access\|accessor\|async\|author\|classdesc\|constant\|const\|constructor\|copyright\|deprecated\|desc\|description\|dict\|event\|example\|file\|file[oO]verview\|final\|function\|global\|ignore\|inherit[dD]oc\|inner\|instance\|interface\|license\|localdoc\|method\|mixin\|nosideeffects\|override\|overview\|preserve\|private\|protected\|public\|readonly\|since\|static\|struct\|todo\|summary\|undocumented\|virtual\)\>"
+
+syntax region jsDocType         contained matchgroup=jsDocTypeBrackets start="{" end="}" contains=jsDocTypeRecord oneline skipwhite nextgroup=jsDocParam
+syntax match  jsDocType         contained "\%(#\|\"\|\w\|\.\|:\|\/\)\+" skipwhite nextgroup=jsDocParam
+syntax region jsDocTypeRecord   contained start=/{/ end=/}/ contains=jsDocTypeRecord extend
+syntax region jsDocTypeRecord   contained start=/\[/ end=/\]/ contains=jsDocTypeRecord extend
+syntax region jsDocTypeNoParam  contained start="{" end="}" oneline
+syntax match  jsDocTypeNoParam  contained "\%(#\|\"\|\w\|\.\|:\|\/\)\+"
+syntax match  jsDocParam        contained "\%(#\|\$\|-\|'\|\"\|{.\{-}}\|\w\|\~\|\.\|:\|\/\|\[.\{-}]\|=\)\+"
+
+syntax region jsDocSeeTag       contained matchgroup=jsDocSeeTag start="{" end="}" contains=jsDocTags
+
+if version >= 508 || !exists("did_javascript_syn_inits")
+  if version < 508
+    let did_javascript_syn_inits = 1
+    command -nargs=+ HiLink hi link <args>
+  else
+    command -nargs=+ HiLink hi def link <args>
+  endif
+  HiLink jsDocTags              Special
+  HiLink jsDocSeeTag            Function
+  HiLink jsDocType              Type
+  HiLink jsDocTypeBrackets      jsDocType
+  HiLink jsDocTypeRecord        jsDocType
+  HiLink jsDocTypeNoParam       Type
+  HiLink jsDocParam             Label
+  delcommand HiLink
+endif
diff --git a/extras/ngdoc.vim b/extras/ngdoc.vim
new file mode 100644
index 00000000..c513d875
--- /dev/null
+++ b/extras/ngdoc.vim
@@ -0,0 +1,3 @@
+syntax match  jsDocTags         contained /@\(link\|method[oO]f\|ngdoc\|ng[iI]nject\|restrict\)/ nextgroup=jsDocParam skipwhite
+syntax match  jsDocType         contained "\%(#\|\$\|\w\|\"\|-\|\.\|:\|\/\)\+" nextgroup=jsDocParam skipwhite
+syntax match  jsDocParam        contained "\%(#\|\$\|\w\|\"\|-\|\.\|:\|{\|}\|\/\|\[\|]\|=\)\+"
diff --git a/ftdetect/flow.vim b/ftdetect/flow.vim
new file mode 100644
index 00000000..3f1ea65b
--- /dev/null
+++ b/ftdetect/flow.vim
@@ -0,0 +1 @@
+autocmd BufNewFile,BufRead *.flow setfiletype flow
diff --git a/ftdetect/javascript.vim b/ftdetect/javascript.vim
index 805e1978..00487326 100644
--- a/ftdetect/javascript.vim
+++ b/ftdetect/javascript.vim
@@ -1,11 +1,8 @@
-au BufNewFile,BufRead *.js setf javascript
-au BufNewFile,BufRead *.jsm setf javascript
-au BufNewFile,BufRead *.json setf javascript
-au BufNewFile,BufRead Jakefile setf javascript
-
 fun! s:SelectJavascript()
-  if getline(1) =~# '^#!.*/bin/env\s\+node\>'
+  if getline(1) =~# '^#!.*/bin/\%(env\s\+\)\?node\>'
     set ft=javascript
   endif
 endfun
-au BufNewFile,BufRead * call s:SelectJavascript()
+
+autocmd BufNewFile,BufRead *.{js,mjs,cjs,jsm,es,es6},Jakefile setfiletype javascript
+autocmd BufNewFile,BufRead * call s:SelectJavascript()
diff --git a/indent/javascript.vim b/indent/javascript.vim
index 29fba2ba..b754e282 100644
--- a/indent/javascript.vim
+++ b/indent/javascript.vim
@@ -1,439 +1,477 @@
 " Vim indent file
 " Language: Javascript
-" Acknowledgement: Based off of vim-ruby maintained by Nikolai Weibull http://vim-ruby.rubyforge.org
-
-" 0. Initialization {{{1
-" =================
+" Maintainer: Chris Paul ( https://github.com/bounceme )
+" URL: https://github.com/pangloss/vim-javascript
+" Last Change: December 4, 2017
 
 " Only load this indent file when no other was loaded.
-if exists("b:did_indent")
+if exists('b:did_indent')
   finish
 endif
 let b:did_indent = 1
 
-setlocal nosmartindent
-
 " Now, set up our indentation expression and keys that trigger it.
 setlocal indentexpr=GetJavascriptIndent()
-setlocal indentkeys=0{,0},0),0],0\,,!^F,o,O,e
+setlocal autoindent nolisp nosmartindent
+setlocal indentkeys+=0],0)
+" Testable with something like:
+" vim  -eNs "+filetype plugin indent on" "+syntax on" "+set ft=javascript" \
+"       "+norm! gg=G" '+%print' '+:q!' testfile.js \
+"       | diff -uBZ testfile.js -
+
+let b:undo_indent = 'setlocal indentexpr< smartindent< autoindent< indentkeys< lisp<'
 
 " Only define the function once.
-if exists("*GetJavascriptIndent")
+if exists('*GetJavascriptIndent')
   finish
 endif
 
 let s:cpo_save = &cpo
 set cpo&vim
 
-" 1. Variables {{{1
-" ============
-
-let s:js_keywords = '^\s*\(break\|case\|catch\|continue\|debugger\|default\|delete\|do\|else\|finally\|for\|function\|if\|in\|instanceof\|new\|return\|switch\|this\|throw\|try\|typeof\|var\|void\|while\|with\)'
+" indent correctly if inside <script>
+" vim/vim@690afe1 for the switch from cindent
+" overridden with b:html_indent_script1
+call extend(g:,{'html_indent_script1': 'inc'},'keep')
 
 " Regex of syntax group names that are or delimit string or are comments.
-let s:syng_strcom = 'string\|regex\|comment\c'
-
-" Regex of syntax group names that are strings.
-let s:syng_string = 'regex\c'
+let s:bvars = {
+      \ 'syng_strcom': 'string\|comment\|regex\|special\|doc\|template\%(braces\)\@!',
+      \ 'syng_str': 'string\|template\|special' }
+" template strings may want to be excluded when editing graphql:
+" au! Filetype javascript let b:syng_str = '^\%(.*template\)\@!.*string\|special'
+" au! Filetype javascript let b:syng_strcom = '^\%(.*template\)\@!.*string\|comment\|regex\|special\|doc'
+
+function s:GetVars()
+  call extend(b:,extend(s:bvars,{'js_cache': [0,0,0]}),'keep')
+endfunction
 
-" Regex of syntax group names that are strings or documentation.
-let s:syng_multiline = 'comment\c'
+" Get shiftwidth value
+if exists('*shiftwidth')
+  function s:sw()
+    return shiftwidth()
+  endfunction
+else
+  function s:sw()
+    return &l:shiftwidth ? &l:shiftwidth : &l:tabstop
+  endfunction
+endif
 
-" Regex of syntax group names that are line comment.
-let s:syng_linecom = 'linecomment\c'
+" Performance for forwards search(): start search at pos rather than masking
+" matches before pos.
+let s:z = has('patch-7.4.984') ? 'z' : ''
 
 " Expression used to check whether we should skip a match with searchpair().
-let s:skip_expr = "synIDattr(synID(line('.'),col('.'),1),'name') =~ '".s:syng_strcom."'"
-
-let s:line_term = '\s*\%(\%(\/\/\).*\)\=$'
-
-" Regex that defines continuation lines, not including (, {, or [.
-let s:continuation_regex = '\%([\\*+/.:]\|\%(<%\)\@<![=-]\|\W[|&?]\|||\|&&\)' . s:line_term
-
-" Regex that defines continuation lines.
-" TODO: this needs to deal with if ...: and so on
-let s:msl_regex = '\%([\\*+/.:([]\|\%(<%\)\@<![=-]\|\W[|&?]\|||\|&&\)' . s:line_term
-
-let s:one_line_scope_regex = '\<\%(if\|else\|for\|while\)\>[^{;]*' . s:line_term
-
-" Regex that defines blocks.
-let s:block_regex = '\%([{[]\)\s*\%(|\%([*@]\=\h\w*,\=\s*\)\%(,\s*[*@]\=\h\w*\)*|\)\=' . s:line_term
-
-let s:var_stmt = '^\s*var'
-
-let s:comma_first = '^\s*,'
-let s:comma_last = ',\s*$'
-
-let s:ternary = '^\s\+[?|:]'
-let s:ternary_q = '^\s\+?'
-
-" 2. Auxiliary Functions {{{1
-" ======================
-
-" Check if the character at lnum:col is inside a string, comment, or is ascii.
-function s:IsInStringOrComment(lnum, col)
-  return synIDattr(synID(a:lnum, a:col, 1), 'name') =~ s:syng_strcom
-endfunction
-
-" Check if the character at lnum:col is inside a string.
-function s:IsInString(lnum, col)
-  return synIDattr(synID(a:lnum, a:col, 1), 'name') =~ s:syng_string
-endfunction
-
-" Check if the character at lnum:col is inside a multi-line comment.
-function s:IsInMultilineComment(lnum, col)
-  return !s:IsLineComment(a:lnum, a:col) && synIDattr(synID(a:lnum, a:col, 1), 'name') =~ s:syng_multiline
-endfunction
+let s:skip_expr = "s:SynAt(line('.'),col('.')) =~? b:syng_strcom"
+let s:in_comm = s:skip_expr[:-14] . "'comment\\|doc'"
+
+let s:rel = has('reltime')
+" searchpair() wrapper
+if s:rel
+  function s:GetPair(start,end,flags,skip)
+    return searchpair('\m'.a:start,'','\m'.a:end,a:flags,a:skip,s:l1,a:skip ==# 's:SkipFunc()' ? 2000 : 200)
+  endfunction
+else
+  function s:GetPair(start,end,flags,skip)
+    return searchpair('\m'.a:start,'','\m'.a:end,a:flags,a:skip,s:l1)
+  endfunction
+endif
 
-" Check if the character at lnum:col is a line comment.
-function s:IsLineComment(lnum, col)
-  return synIDattr(synID(a:lnum, a:col, 1), 'name') =~ s:syng_linecom
+function s:SynAt(l,c)
+  let byte = line2byte(a:l) + a:c - 1
+  let pos = index(s:synid_cache[0], byte)
+  if pos == -1
+    let s:synid_cache[:] += [[byte], [synIDattr(synID(a:l, a:c, 0), 'name')]]
+  endif
+  return s:synid_cache[1][pos]
 endfunction
 
-" Find line above 'lnum' that isn't empty, in a comment, or in a string.
-function s:PrevNonBlankNonString(lnum)
-  let in_block = 0
-  let lnum = prevnonblank(a:lnum)
-  while lnum > 0
-    " Go in and out of blocks comments as necessary.
-    " If the line isn't empty (with opt. comment) or in a string, end search.
-    let line = getline(lnum)
-    if line =~ '/\*'
-      if in_block
-        let in_block = 0
-      else
-        break
+function s:ParseCino(f)
+  let [s, n, divider] = [strridx(&cino, a:f)+1, '', 0]
+  while s && &cino[ s ] =~ '[^,]'
+    if &cino[ s ] == '.'
+      let divider = 1
+    elseif &cino[ s ] ==# 's'
+      if n !~ '\d'
+        return n . s:sw() + 0
       endif
-    elseif !in_block && line =~ '\*/'
-      let in_block = 1
-    elseif !in_block && line !~ '^\s*\%(//\).*$' && !(s:IsInStringOrComment(lnum, 1) && s:IsInStringOrComment(lnum, strlen(line)))
+      let n = str2nr(n) * s:sw()
       break
+    else
+      let [n, divider] .= [&cino[ s ], 0]
     endif
-    let lnum = prevnonblank(lnum - 1)
+    let s += 1
   endwhile
-  return lnum
+  return str2nr(n) / max([divider, 1])
 endfunction
 
-" Find line above 'lnum' that started the continuation 'lnum' may be part of.
-function s:GetMSL(lnum, in_one_line_scope)
-  " Start on the line we're at and use its indent.
-  let msl = a:lnum
-  let lnum = s:PrevNonBlankNonString(a:lnum - 1)
-  while lnum > 0
-    " If we have a continuation line, or we're in a string, use line as MSL.
-    " Otherwise, terminate search as we have found our MSL already.
-    let line = getline(lnum)
-    let col = match(line, s:msl_regex) + 1
-    if (col > 0 && !s:IsInStringOrComment(lnum, col)) || s:IsInString(lnum, strlen(line))
-      let msl = lnum
-    else
-      " Don't use lines that are part of a one line scope as msl unless the
-      " flag in_one_line_scope is set to 1
-      "
-      if a:in_one_line_scope
+" Optimized {skip} expr, only callable from the search loop which
+" GetJavascriptIndent does to find the containing [[{(] (side-effects)
+function s:SkipFunc()
+  if s:top_col == 1
+    throw 'out of bounds'
+  elseif s:check_in
+    if eval(s:skip_expr)
+      return 1
+    endif
+    let s:check_in = 0
+  elseif getline('.') =~ '\%<'.col('.').'c\/.\{-}\/\|\%>'.col('.').'c[''"]\|\\$'
+    if eval(s:skip_expr)
+      return 1
+    endif
+  elseif search('\m`\|\${\|\*\/','nW'.s:z,s:looksyn)
+    if eval(s:skip_expr)
+      let s:check_in = 1
+      return 1
+    endif
+  else
+    let s:synid_cache[:] += [[line2byte('.') + col('.') - 1], ['']]
+  endif
+  let [s:looksyn, s:top_col] = getpos('.')[1:2]
+endfunction
+
+function s:AlternatePair()
+  let [pat, l:for] = ['[][(){};]', 2]
+  while s:SearchLoop(pat,'bW','s:SkipFunc()')
+    if s:LookingAt() == ';'
+      if !l:for
+        if s:GetPair('{','}','bW','s:SkipFunc()')
+          return
+        endif
         break
-      end
-      let msl_one_line = s:Match(lnum, s:one_line_scope_regex)
-      if msl_one_line == 0
+      else
+        let [pat, l:for] = ['[{}();]', l:for - 1]
+      endif
+    else
+      let idx = stridx('])}',s:LookingAt())
+      if idx == -1
+        return
+      elseif !s:GetPair(['\[','(','{'][idx],'])}'[idx],'bW','s:SkipFunc()')
         break
       endif
     endif
-    let lnum = s:PrevNonBlankNonString(lnum - 1)
   endwhile
-  return msl
+  throw 'out of bounds'
 endfunction
 
-function s:RemoveTrailingComments(content)
-  let single = '\/\/\(.*\)\s*$'
-  let multi = '\/\*\(.*\)\*\/\s*$'
-  return substitute(substitute(a:content, single, '', ''), multi, '', '')
+function s:Nat(int)
+  return a:int * (a:int > 0)
 endfunction
 
-" Find if the string is inside var statement (but not the first string)
-function s:InMultiVarStatement(lnum)
-  let lnum = s:PrevNonBlankNonString(a:lnum - 1)
-
-"  let type = synIDattr(synID(lnum, indent(lnum) + 1, 0), 'name')
-
-  " loop through previous expressions to find a var statement
-  while lnum > 0
-    let line = getline(lnum)
-
-    " if the line is a js keyword
-    if (line =~ s:js_keywords)
-      " check if the line is a var stmt
-      " if the line has a comma first or comma last then we can assume that we
-      " are in a multiple var statement
-      if (line =~ s:var_stmt)
-        return lnum
-      endif
-
-      " other js keywords, not a var
-      return 0
-    endif
-
-    let lnum = s:PrevNonBlankNonString(lnum - 1)
-  endwhile
-
-  " beginning of program, not a var
-  return 0
+function s:LookingAt()
+  return getline('.')[col('.')-1]
 endfunction
 
-" Find line above with beginning of the var statement or returns 0 if it's not
-" this statement
-function s:GetVarIndent(lnum)
-  let lvar = s:InMultiVarStatement(a:lnum)
-  let prev_lnum = s:PrevNonBlankNonString(a:lnum - 1)
-
-  if lvar
-    let line = s:RemoveTrailingComments(getline(prev_lnum))
+function s:Token()
+  return s:LookingAt() =~ '\k' ? expand('<cword>') : s:LookingAt()
+endfunction
 
-    " if the previous line doesn't end in a comma, return to regular indent
-    if (line !~ s:comma_last)
-      return indent(prev_lnum) - &sw
+function s:PreviousToken(...)
+  let [l:pos, tok] = [getpos('.'), '']
+  if search('\m\k\{1,}\|\S','ebW')
+    if getline('.')[col('.')-2:col('.')-1] == '*/'
+      if eval(s:in_comm) && !s:SearchLoop('\S\ze\_s*\/[/*]','bW',s:in_comm)
+        call setpos('.',l:pos)
+      else
+        let tok = s:Token()
+      endif
     else
-      return indent(lvar) + &sw
+      let two = a:0 || line('.') != l:pos[1] ? strridx(getline('.')[:col('.')],'//') + 1 : 0
+      if two && eval(s:in_comm)
+        call cursor(0,two)
+        let tok = s:PreviousToken(1)
+        if tok is ''
+          call setpos('.',l:pos)
+        endif
+      else
+        let tok = s:Token()
+      endif
     endif
   endif
+  return tok
+endfunction
 
-  return -1
+function s:Pure(f,...)
+  return eval("[call(a:f,a:000),cursor(a:firstline,".col('.').")][0]")
 endfunction
 
+function s:SearchLoop(pat,flags,expr)
+  return s:GetPair(a:pat,'\_$.',a:flags,a:expr)
+endfunction
 
-" Check if line 'lnum' has more opening brackets than closing ones.
-function s:LineHasOpeningBrackets(lnum)
-  let open_0 = 0
-  let open_2 = 0
-  let open_4 = 0
-  let line = getline(a:lnum)
-  let pos = match(line, '[][(){}]', 0)
-  while pos != -1
-    if !s:IsInStringOrComment(a:lnum, pos + 1)
-      let idx = stridx('(){}[]', line[pos])
-      if idx % 2 == 0
-        let open_{idx} = open_{idx} + 1
+function s:ExprCol()
+  if getline('.')[col('.')-2] == ':'
+    return 1
+  endif
+  let bal = 0
+  while s:SearchLoop('[{}?:]','bW',s:skip_expr)
+    if s:LookingAt() == ':'
+      let bal -= !search('\m:\%#','bW')
+    elseif s:LookingAt() == '?'
+      if getline('.')[col('.'):col('.')+1] =~ '^\.\d\@!'
+        " ?. conditional chain, not ternary start
+      elseif !bal
+        return 1
       else
-        let open_{idx - 1} = open_{idx - 1} - 1
+        let bal += 1
       endif
+    elseif s:LookingAt() == '{'
+      return !s:IsBlock()
+    elseif !s:GetPair('{','}','bW',s:skip_expr)
+      break
     endif
-    let pos = match(line, '[][(){}]', pos + 1)
   endwhile
-  return (open_0 > 0) . (open_2 > 0) . (open_4 > 0)
-endfunction
-
-function s:Match(lnum, regex)
-  let col = match(getline(a:lnum), a:regex) + 1
-  return col > 0 && !s:IsInStringOrComment(a:lnum, col) ? col : 0
 endfunction
 
-function s:IndentWithContinuation(lnum, ind, width)
-  " Set up variables to use and search for MSL to the previous line.
-  let p_lnum = a:lnum
-  let lnum = s:GetMSL(a:lnum, 1)
-  let line = getline(lnum)
-
-  " If the previous line wasn't a MSL and is continuation return its indent.
-  " TODO: the || s:IsInString() thing worries me a bit.
-  if p_lnum != lnum
-    if s:Match(p_lnum,s:continuation_regex)||s:IsInString(p_lnum,strlen(line))
-      return a:ind
-    endif
+" configurable regexes that define continuation lines, not including (, {, or [.
+let s:opfirst = '^' . get(g:,'javascript_opfirst',
+      \ '\C\%([<>=,.?^%|/&]\|\([-:+]\)\1\@!\|\*\+\|!=\|in\%(stanceof\)\=\>\)')
+let s:continuation = get(g:,'javascript_continuation',
+      \ '\C\%([<=,.~!?/*^%|&:]\|+\@<!+\|-\@<!-\|=\@<!>\|\<\%(typeof\|new\|delete\|void\|in\|instanceof\|await\)\)') . '$'
+
+function s:Continues()
+  let tok = matchstr(strpart(getline('.'),col('.')-15,15),s:continuation)
+  if tok =~ '[a-z:]'
+    return tok == ':' ? s:ExprCol() : s:PreviousToken() != '.'
+  elseif tok !~ '[/>]'
+    return tok isnot ''
   endif
+  return s:SynAt(line('.'),col('.')) !~? (tok == '>' ? 'jsflow\|^html' : 'regex')
+endfunction
 
-  " Set up more variables now that we know we aren't continuation bound.
-  let msl_ind = indent(lnum)
-
-  " If the previous line ended with [*+/.-=], start a continuation that
-  " indents an extra level.
-  if s:Match(lnum, s:continuation_regex)
-    if lnum == p_lnum
-      return msl_ind + a:width
-    else
-      return msl_ind
+" Check if line 'lnum' has a balanced amount of parentheses.
+function s:Balanced(lnum,line)
+  let l:open = 0
+  let pos = match(a:line, '[][(){}]')
+  while pos != -1
+    if s:SynAt(a:lnum,pos + 1) !~? b:syng_strcom
+      let l:open += matchend(a:line[pos],'[[({]')
+      if l:open < 0
+        return
+      endif
     endif
-  endif
-
-  return a:ind
+    let pos = match(a:line, !l:open ? '[][(){}]' : '()' =~ a:line[pos] ?
+          \ '[()]' : '{}' =~ a:line[pos] ? '[{}]' : '[][]', pos + 1)
+  endwhile
+  return !l:open
 endfunction
 
-function s:InOneLineScope(lnum)
-  let msl = s:GetMSL(a:lnum, 1)
-  if msl > 0 && s:Match(msl, s:one_line_scope_regex)
-    return msl
+function s:OneScope()
+  if s:LookingAt() == ')' && s:GetPair('(', ')', 'bW', s:skip_expr)
+    let tok = s:PreviousToken()
+    return (count(split('for if let while with'),tok) ||
+          \ tok =~# '^await$\|^each$' && s:PreviousToken() ==# 'for') &&
+          \ s:Pure('s:PreviousToken') != '.' && !(tok == 'while' && s:DoWhile())
+  elseif s:Token() =~# '^else$\|^do$'
+    return s:Pure('s:PreviousToken') != '.'
+  elseif strpart(getline('.'),col('.')-2,2) == '=>'
+    call cursor(0,col('.')-1)
+    return s:PreviousToken() != ')' || s:GetPair('(', ')', 'bW', s:skip_expr)
   endif
-  return 0
 endfunction
 
-function s:ExitingOneLineScope(lnum)
-  let msl = s:GetMSL(a:lnum, 1)
-  if msl > 0
-    " if the current line is in a one line scope ..
-    if s:Match(msl, s:one_line_scope_regex)
-      return 0
-    else
-      let prev_msl = s:GetMSL(msl - 1, 1)
-      if s:Match(prev_msl, s:one_line_scope_regex)
-        return prev_msl
+function s:DoWhile()
+  let cpos = searchpos('\m\<','cbW')
+  while s:SearchLoop('\C[{}]\|\<\%(do\|while\)\>','bW',s:skip_expr)
+    if s:LookingAt() =~ '\a'
+      if s:Pure('s:IsBlock')
+        if s:LookingAt() ==# 'd'
+          return 1
+        endif
+        break
       endif
+    elseif s:LookingAt() != '}' || !s:GetPair('{','}','bW',s:skip_expr)
+      break
     endif
-  endif
-  return 0
+  endwhile
+  call call('cursor',cpos)
 endfunction
 
-" 3. GetJavascriptIndent Function {{{1
-" =========================
-
-function GetJavascriptIndent()
-  " 3.1. Setup {{{2
-  " ----------
-
-  " Set up variables for restoring position in file.  Could use v:lnum here.
-  let vcol = col('.')
-
-  " 3.2. Work on the current line {{{2
-  " -----------------------------
-
-  let ind = -1
-  " Get the current line.
-  let line = getline(v:lnum)
-  " previous nonblank line number
-  let prevline = prevnonblank(v:lnum - 1)
-
-  " If we got a closing bracket on an empty line, find its match and indent
-  " according to it.  For parentheses we indent to its column - 1, for the
-  " others we indent to the containing line's MSL's level.  Return -1 if fail.
-  let col = matchend(line, '^\s*[],})]')
-  if col > 0 && !s:IsInStringOrComment(v:lnum, col)
-    call cursor(v:lnum, col)
-
-    let lvar = s:InMultiVarStatement(v:lnum)
-    if lvar
-      let prevline_contents = s:RemoveTrailingComments(getline(prevline))
-
-      " check for comma first
-      if (line[col - 1] =~ ',')
-        " if the previous line ends in comma or semicolon don't indent
-        if (prevline_contents =~ '[;,]\s*$')
-          return indent(s:GetMSL(line('.'), 0))
-        " get previous line indent, if it's comma first return prevline indent
-        elseif (prevline_contents =~ s:comma_first)
-          return indent(prevline)
-        " otherwise we indent 1 level
-        else
-          return indent(lvar) + &sw
-        endif
-      endif
+" returns total offset from braceless contexts. 'num' is the lineNr which
+" encloses the entire context, 'cont' if whether a:firstline is a continued
+" expression, which could have started in a braceless context
+function s:IsContOne(cont)
+  let [l:num, pind] = b:js_cache[1] ?
+        \ [b:js_cache[1], indent(b:js_cache[1]) + s:sw()] : [1,0]
+  let [ind, b_l] = [indent('.') + !a:cont, 0]
+  while line('.') > l:num && ind > pind || line('.') == l:num
+    if indent('.') < ind && s:OneScope()
+      let b_l += 1
+    elseif !a:cont || b_l || ind < indent(a:firstline)
+      break
+    else
+      call cursor(0,1)
+    endif
+    let ind = min([ind, indent('.')])
+    if s:PreviousToken() is ''
+      break
     endif
+  endwhile
+  return b_l
+endfunction
 
+function s:IsSwitch()
+  return search(printf('\m\C\%%%dl\%%%dc%s',b:js_cache[1],b:js_cache[2],
+        \ '{\_s*\%(\%(\/\/.*\_$\|\/\*\_.\{-}\*\/\)\@>\_s*\)*\%(case\|default\)\>'),'nW'.s:z)
+endfunction
 
-    let bs = strpart('(){}[]', stridx(')}]', line[col - 1]) * 2, 2)
-    if searchpair(escape(bs[0], '\['), '', bs[1], 'bW', s:skip_expr) > 0
-      if line[col-1]==')' && col('.') != col('$') - 1
-        let ind = virtcol('.')-1
-      else
-        let ind = indent(s:GetMSL(line('.'), 0))
-      endif
+" https://github.com/sweet-js/sweet.js/wiki/design#give-lookbehind-to-the-reader
+function s:IsBlock()
+  let tok = s:PreviousToken()
+  if join(s:stack) =~? 'xml\|jsx' && s:SynAt(line('.'),col('.')-1) =~? 'xml\|jsx'
+    let s:in_jsx = 1
+    return tok != '{'
+  elseif tok =~ '\k'
+    if tok ==# 'type'
+      return s:Pure('eval',"s:PreviousToken() !~# '^\\%(im\\|ex\\)port$' || s:PreviousToken() == '.'")
+    elseif tok ==# 'of'
+      return s:Pure('eval',"!s:GetPair('[[({]','[])}]','bW',s:skip_expr) || s:LookingAt() != '(' ||"
+            \ ."s:{s:PreviousToken() ==# 'await' ? 'Previous' : ''}Token() !=# 'for' || s:PreviousToken() == '.'")
     endif
-    return ind
-  endif
-
-  " If the line is comma first, dedent 1 level
-  if (getline(prevline) =~ s:comma_first)
-    return indent(prevline) - &sw
+    return index(split('return const let import export extends yield default delete var await void typeof throw case new in instanceof')
+          \ ,tok) < (line('.') != a:firstline) || s:Pure('s:PreviousToken') == '.'
+  elseif tok == '>'
+    return getline('.')[col('.')-2] == '=' || s:SynAt(line('.'),col('.')) =~? 'jsflow\|^html'
+  elseif tok == '*'
+    return s:Pure('s:PreviousToken') == ':'
+  elseif tok == ':'
+    return s:Pure('eval',"s:PreviousToken() =~ '^\\K\\k*$' && !s:ExprCol()")
+  elseif tok == '/'
+    return s:SynAt(line('.'),col('.')) =~? 'regex'
+  elseif tok !~ '[=~!<,.?^%|&([]'
+    return tok !~ '[-+]' || line('.') != a:firstline && getline('.')[col('.')-2] == tok
   endif
+endfunction
 
-  if (line =~ s:ternary)
-    if (getline(prevline) =~ s:ternary_q)
-      return indent(prevline)
-    else
-      return indent(prevline) + &sw
+function GetJavascriptIndent()
+  call s:GetVars()
+  let s:synid_cache = [[],[]]
+  let l:line = getline(v:lnum)
+  " use synstack as it validates syn state and works in an empty line
+  let s:stack = [''] + map(synstack(v:lnum,1),"synIDattr(v:val,'name')")
+
+  " start with strings,comments,etc.
+  if s:stack[-1] =~? 'comment\|doc'
+    if l:line !~ '^\s*\/[/*]'
+      return l:line =~ '^\s*\*' ? cindent(v:lnum) : -1
+    endif
+  elseif s:stack[-1] =~? b:syng_str
+    if b:js_cache[0] == v:lnum - 1 && s:Balanced(v:lnum-1,getline(v:lnum-1))
+      let b:js_cache[0] = v:lnum
     endif
+    return -1
   endif
 
-  " If we are in a multi-line comment, cindent does the right thing.
-  if s:IsInMultilineComment(v:lnum, 1) && !s:IsLineComment(v:lnum, 1)
-    return cindent(v:lnum)
+  let nest = get(get(b:,'hi_indent',{}),'blocklnr')
+  let s:l1 = max([0, prevnonblank(v:lnum) - (s:rel ? 2000 : 1000), nest])
+  call cursor(v:lnum,1)
+  if s:PreviousToken() is ''
+    return
   endif
+  let [l:lnum, lcol, pline] = getpos('.')[1:2] + [getline('.')[:col('.')-1]]
 
-  " Check for multiple var assignments
-"  let var_indent = s:GetVarIndent(v:lnum)
-"  if var_indent >= 0
-"    return var_indent
-"  endif
-
-  " 3.3. Work on the previous line. {{{2
-  " -------------------------------
-
-  " If the line is empty and the previous nonblank line was a multi-line
-  " comment, use that comment's indent. Deduct one char to account for the
-  " space in ' */'.
-  if line =~ '^\s*$' && s:IsInMultilineComment(prevline, 1)
-    return indent(prevline) - 1
+  let l:line = substitute(l:line,'^\s*','','')
+  let l:line_s = l:line[0]
+  if l:line[:1] == '/*'
+    let l:line = substitute(l:line,'^\%(\/\*.\{-}\*\/\s*\)*','','')
   endif
-
-  " Find a non-blank, non-multi-line string line above the current line.
-  let lnum = s:PrevNonBlankNonString(v:lnum - 1)
-
-  " If the line is empty and inside a string, use the previous line.
-  if line =~ '^\s*$' && lnum != prevline
-    return indent(prevnonblank(v:lnum))
+  if l:line =~ '^\/[/*]'
+    let l:line = ''
   endif
 
-  " At the start of the file use zero indent.
-  if lnum == 0
-    return 0
+  " the containing paren, bracket, or curly. Many hacks for performance
+  call cursor(v:lnum,1)
+  let idx = index([']',')','}'],l:line[0])
+  if b:js_cache[0] > l:lnum && b:js_cache[0] < v:lnum ||
+        \ b:js_cache[0] == l:lnum && s:Balanced(l:lnum,pline)
+    call call('cursor',b:js_cache[1:])
+  else
+    let [s:looksyn, s:top_col, s:check_in, s:l1] = [v:lnum - 1,0,0,
+          \ max([s:l1, &smc ? search('\m^.\{'.&smc.',}','nbW',s:l1 + 1) + 1 : 0])]
+    try
+      if idx != -1
+        call s:GetPair(['\[','(','{'][idx],'])}'[idx],'bW','s:SkipFunc()')
+      elseif getline(v:lnum) !~ '^\S' && s:stack[-1] =~? 'block\|^jsobject$'
+        if !s:GetPair('{','}','bW','s:SkipFunc()') && s:stack[-1] ==# 'jsObject'
+          return indent(l:lnum)
+        endif
+      else
+        call s:AlternatePair()
+      endif
+    catch /^\Cout of bounds$/
+      call cursor(v:lnum,1)
+    endtry
+    let b:js_cache[1:] = line('.') == v:lnum ? [0,0] : getpos('.')[1:2]
   endif
 
-  " Set up variables for current line.
-  let line = getline(lnum)
-  let ind = indent(lnum)
+  let [b:js_cache[0], num] = [v:lnum, b:js_cache[1]]
 
-  " If the previous line ended with a block opening, add a level of indent.
-  if s:Match(lnum, s:block_regex)
-    return indent(s:GetMSL(lnum, 0)) + &sw
-  endif
-
-  " If the previous line contained an opening bracket, and we are still in it,
-  " add indent depending on the bracket type.
-  if line =~ '[[({]'
-    let counts = s:LineHasOpeningBrackets(lnum)
-    if counts[0] == '1' && searchpair('(', '', ')', 'bW', s:skip_expr) > 0
-      if col('.') + 1 == col('$')
-        return ind + &sw
+  let [num_ind, is_op, b_l, l:switch_offset, s:in_jsx] = [s:Nat(indent(num)),0,0,0,0]
+  if !num || s:LookingAt() == '{' && s:IsBlock()
+    let ilnum = line('.')
+    if num && !s:in_jsx && s:LookingAt() == ')' && s:GetPair('(',')','bW',s:skip_expr)
+      if ilnum == num
+        let [num, num_ind] = [line('.'), indent('.')]
+      endif
+      if idx == -1 && s:PreviousToken() ==# 'switch' && s:IsSwitch()
+        let l:switch_offset = &cino !~ ':' ? s:sw() : s:ParseCino(':')
+        if pline[-1:] != '.' && l:line =~# '^\%(default\|case\)\>'
+          return s:Nat(num_ind + l:switch_offset)
+        elseif &cino =~ '='
+          let l:case_offset = s:ParseCino('=')
+        endif
+      endif
+    endif
+    if idx == -1 && pline[-1:] !~ '[{;]'
+      call cursor(l:lnum, lcol)
+      let sol = matchstr(l:line,s:opfirst)
+      if sol is '' || sol == '/' && s:SynAt(v:lnum,
+            \ 1 + len(getline(v:lnum)) - len(l:line)) =~? 'regex'
+        if s:Continues()
+          let is_op = s:sw()
+        endif
+      elseif num && sol =~# '^\%(in\%(stanceof\)\=\|\*\)$' &&
+            \ s:LookingAt() == '}' && s:GetPair('{','}','bW',s:skip_expr) &&
+            \ s:PreviousToken() == ')' && s:GetPair('(',')','bW',s:skip_expr) &&
+            \ (s:PreviousToken() == ']' || s:LookingAt() =~ '\k' &&
+            \ s:{s:PreviousToken() == '*' ? 'Previous' : ''}Token() !=# 'function')
+        return num_ind + s:sw()
       else
-        return virtcol('.')
+        let is_op = s:sw()
       endif
-    elseif counts[1] == '1' || counts[2] == '1'
-      return ind + &sw
-    else
-      call cursor(v:lnum, vcol)
-    end
+      call cursor(l:lnum, lcol)
+      let b_l = s:Nat(s:IsContOne(is_op) - (!is_op && l:line =~ '^{')) * s:sw()
+    endif
+  elseif idx == -1 && s:LookingAt() == '(' && &cino =~ '(' &&
+        \ (search('\m\S','nbW',num) || s:ParseCino('U'))
+    let pval = s:ParseCino('(')
+    if !pval
+      let [Wval, vcol] = [s:ParseCino('W'), virtcol('.')]
+      if search('\m'.get(g:,'javascript_indent_W_pat','\S'),'W',num)
+        return s:ParseCino('w') ? vcol : virtcol('.')-1
+      endif
+      return Wval ? s:Nat(num_ind + Wval) : vcol
+    endif
+    return s:Nat(num_ind + pval + searchpair('\m(','','\m)','nbrmW',s:skip_expr,num) * s:sw())
   endif
 
-  " 3.4. Work on the MSL line. {{{2
-  " --------------------------
-
-  let ind_con = ind
-  let ind = s:IndentWithContinuation(lnum, ind_con, &sw)
-
-  " }}}2
-  "
-  "
-  let ols = s:InOneLineScope(lnum)
-  if ols > 0
-    let ind = ind + &sw
-  else
-    let ols = s:ExitingOneLineScope(lnum)
-    while ols > 0 && ind > 0
-      let ind = ind - &sw
-      let ols = s:InOneLineScope(ols - 1)
-    endwhile
+  " main return
+  if l:line =~ '^[])}]\|^|}'
+    if l:line_s == ')'
+      if s:ParseCino('M')
+        return indent(l:lnum)
+      elseif num && &cino =~# 'm' && !s:ParseCino('m')
+        return virtcol('.') - 1
+      endif
+    endif
+    return num_ind
+  elseif num
+    return s:Nat(num_ind + get(l:,'case_offset',s:sw()) + l:switch_offset + b_l + is_op)
+  elseif nest
+    return indent(nextnonblank(nest+1)) + b_l + is_op
   endif
-
-  return ind
+  return b_l + is_op
 endfunction
 
-" }}}1
-
 let &cpo = s:cpo_save
 unlet s:cpo_save
diff --git a/syntax/flow.vim b/syntax/flow.vim
new file mode 100644
index 00000000..3f972183
--- /dev/null
+++ b/syntax/flow.vim
@@ -0,0 +1,2 @@
+runtime syntax/javascript.vim
+runtime extras/flow.vim
diff --git a/syntax/javascript.vim b/syntax/javascript.vim
index e72c63a4..02b0c78c 100644
--- a/syntax/javascript.vim
+++ b/syntax/javascript.vim
@@ -12,205 +12,232 @@ if !exists("main_syntax")
   let main_syntax = 'javascript'
 endif
 
-if !exists('g:javascript_conceal')
-  let g:javascript_conceal = 0
-endif
-
-"" Drop fold if it is set but VIM doesn't support it.
-let b:javascript_fold='true'
-if version < 600    " Don't support the old version
-  unlet! b:javascript_fold
+" Dollar sign is permitted anywhere in an identifier
+if (v:version > 704 || v:version == 704 && has('patch1142')) && main_syntax == 'javascript'
+  syntax iskeyword @,48-57,_,192-255,$
+else
+  setlocal iskeyword+=$
 endif
 
-"" dollar sign is permittd anywhere in an identifier
-setlocal iskeyword+=$
-
 syntax sync fromstart
+" TODO: Figure out what type of casing I need
+" syntax case ignore
+syntax case match
 
-syntax match   jsNoise           /\%(:\|,\|\;\|\.\)/
-
-"" Program Keywords
-syntax keyword jsStorageClass   const var let
-syntax keyword jsOperator       delete instanceof typeof void new in
-syntax match   jsOperator       /\(!\||\|&\|+\|-\|<\|>\|=\|%\|\/\|*\|\~\|\^\)/
+syntax match   jsNoise          /[:;]/
+syntax match   jsNoise          /,/ skipwhite skipempty nextgroup=@jsExpression
+syntax match   jsDot            /\./ skipwhite skipempty nextgroup=jsObjectProp,jsFuncCall,jsPrototype,jsTaggedTemplate
+syntax match   jsObjectProp     contained /\<\K\k*/
+syntax match   jsFuncCall       /\<\K\k*\ze[\s\n]*(/
+syntax match   jsParensError    /[)}\]]/
+
+" Program Keywords
+syntax keyword jsStorageClass   const var let skipwhite skipempty nextgroup=jsDestructuringBlock,jsDestructuringArray,jsVariableDef
+syntax match   jsVariableDef    contained /\<\K\k*/ skipwhite skipempty nextgroup=jsFlowDefinition
+syntax keyword jsOperatorKeyword delete instanceof typeof void new in skipwhite skipempty nextgroup=@jsExpression
+syntax keyword jsOf             of skipwhite skipempty nextgroup=@jsExpression
+syntax match   jsOperator       "[-!|&+<>=%/*~^]" skipwhite skipempty nextgroup=@jsExpression
+syntax match   jsOperator       /::/ skipwhite skipempty nextgroup=@jsExpression
 syntax keyword jsBooleanTrue    true
 syntax keyword jsBooleanFalse   false
 
-"" JavaScript comments
-syntax keyword jsCommentTodo    TODO FIXME XXX TBD contained
-syntax region  jsLineComment    start=+\/\/+ end=+$+ keepend contains=jsCommentTodo,@Spell
-syntax region  jsEnvComment     start="\%^#!" end="$" display
-syntax region  jsLineComment    start=+^\s*\/\/+ skip=+\n\s*\/\/+ end=+$+ keepend contains=jsCommentTodo,@Spell fold
-syntax region  jsCvsTag         start="\$\cid:" end="\$" oneline contained
-syntax region  jsComment        start="/\*"  end="\*/" contains=jsCommentTodo,jsCvsTag,@Spell fold
-
-"" JSDoc / JSDoc Toolkit
-if !exists("javascript_ignore_javaScriptdoc")
-  syntax case ignore
-
-  "" syntax coloring for javadoc comments (HTML)
-  "syntax include @javaHtml <sfile>:p:h/html.vim
-  "unlet b:current_syntax
-
-  syntax region jsDocComment      matchgroup=jsComment start="/\*\*\s*"  end="\*/" contains=jsDocTags,jsCommentTodo,jsCvsTag,@jsHtml,@Spell fold
-
-  " tags containing a param
-  syntax match  jsDocTags         contained "@\(alias\|augments\|borrows\|class\|constructs\|default\|defaultvalue\|emits\|exception\|exports\|extends\|file\|fires\|kind\|listens\|member\|memberOf\|mixes\|module\|name\|namespace\|requires\|throws\|var\|variation\|version\)\>" nextgroup=jsDocParam skipwhite
-  " tags containing type and param
-  syntax match  jsDocTags         contained "@\(arg\|argument\|param\|property\)\>" nextgroup=jsDocType skipwhite
-  " tags containing type but no param
-  syntax match  jsDocTags         contained "@\(callback\|enum\|external\|this\|type\|typedef\|return\|returns\)\>" nextgroup=jsDocTypeNoParam skipwhite
-  " tags containing references
-  syntax match  jsDocTags         contained "@\(lends\|see\)\>" nextgroup=jsDocSeeTag skipwhite
-  " other tags (no extra syntax)
-  syntax match  jsDocTags         contained "@\(abstract\|access\|author\|classdesc\|constant\|const\|constructor\|copyright\|deprecated\|desc\|description\|event\|example\|fileOverview\|function\|global\|ignore\|inner\|instance\|license\|method\|mixin\|overview\|private\|protected\|public\|readonly\|since\|static\|todo\|summary\|undocumented\|virtual\)\>"
-
-  syntax region jsDocType         start="{" end="}" oneline contained nextgroup=jsDocParam skipwhite
-  syntax match  jsDocType         contained "\%(#\|\"\|\w\|\.\|:\|\/\)\+" nextgroup=jsDocParam skipwhite
-  syntax region jsDocTypeNoParam  start="{" end="}" oneline contained
-  syntax match  jsDocTypeNoParam  contained "\%(#\|\"\|\w\|\.\|:\|\/\)\+"
-  syntax match  jsDocParam        contained "\%(#\|\"\|{\|}\|\w\|\.\|:\|\/\)\+"
-  syntax region jsDocSeeTag       contained matchgroup=jsDocSeeTag start="{" end="}" contains=jsDocTags
-
-  syntax case match
-endif   "" JSDoc end
-
-syntax case match
-
-"" Syntax in the JavaScript code
-syntax match   jsFuncCall        /\k\+\%(\s*(\)\@=/
-syntax match   jsSpecial         "\v\\%(0|\\x\x\{2\}\|\\u\x\{4\}\|\c[A-Z]|.)"
-syntax region  jsStringD         start=+"+  skip=+\\\\\|\\$"+  end=+"+  contains=jsSpecial,@htmlPreproc
-syntax region  jsStringS         start=+'+  skip=+\\\\\|\\$'+  end=+'+  contains=jsSpecial,@htmlPreproc
-syntax region  jsRegexpCharClass start=+\[+ end=+\]+ contained
-syntax match   jsRegexpBoundary   "\v%(\<@![\^$]|\\[bB])" contained
-syntax match   jsRegexpBackRef   "\v\\[1-9][0-9]*" contained
-syntax match   jsRegexpQuantifier "\v\\@<!%([?*+]|\{\d+%(,|,\d+)?})\??" contained
-syntax match   jsRegexpOr        "\v\<@!\|" contained
-syntax match   jsRegexpMod       "\v\(@<=\?[:=!>]" contained
-syntax cluster jsRegexpSpecial   contains=jsRegexpBoundary,jsRegexpBackRef,jsRegexpQuantifier,jsRegexpOr,jsRegexpMod
-syntax region  jsRegexpGroup     start="\\\@<!(" end="\\\@<!)" contained contains=jsRegexpCharClass,@jsRegexpSpecial keepend
-syntax region  jsRegexpString    start=+\(\(\(return\|case\)\s\+\)\@<=\|\(\([)\]"']\|\d\|\w\)\s*\)\@<!\)/\(\*\|/\)\@!+ skip=+\\\\\|\\/+ end=+/[gimy]\{,4}+ contains=jsSpecial,jsRegexpCharClass,jsRegexpGroup,@jsRegexpSpecial,@htmlPreproc oneline keepend
-syntax match   jsNumber          /\<-\=\d\+L\=\>\|\<0[xX]\x\+\>/
-syntax keyword jsNumber          Infinity
-syntax match   jsFloat           /\<-\=\%(\d\+\.\d\+\|\d\+\.\|\.\d\+\)\%([eE][+-]\=\d\+\)\=\>/
-syntax match   jsObjectKey       /\<[a-zA-Z_$][0-9a-zA-Z_$]*\(\s*:\)\@=/ contains=jsFunctionKey
-syntax match   jsFunctionKey     /\<[a-zA-Z_$][0-9a-zA-Z_$]*\(\s*:\s*function\s*\)\@=/ contained
-
-"" JavaScript Prototype
-syntax keyword jsPrototype      prototype
-
-if g:javascript_conceal == 1
-  syntax keyword jsNull           null conceal cchar=ø
-  syntax keyword jsThis           this conceal cchar=@
-  syntax keyword jsReturn         return conceal cchar=⇚
-  syntax keyword jsUndefined      undefined conceal cchar=¿
-  syntax keyword jsNan            NaN conceal cchar=ℕ
-else
-  syntax keyword jsNull           null
-  syntax keyword jsThis           this
-  syntax keyword jsReturn         return
-  syntax keyword jsUndefined      undefined
-  syntax keyword jsNan            NaN
-endif
-
-"" Statement Keywords
-syntax keyword jsStatement      break continue with
-syntax keyword jsConditional    if else switch
-syntax keyword jsRepeat         do while for
-syntax keyword jsLabel          case default
-syntax keyword jsKeyword        yield
-syntax keyword jsException      try catch throw finally
-
-syntax keyword jsGlobalObjects   Array Boolean Date Function Iterator Number Object RegExp String Proxy ParallelArray ArrayBuffer DataView Float32Array Float64Array Int16Array Int32Array Int8Array Uint16Array Uint32Array Uint8Array Uint8ClampedArray Intl JSON Math console document window
-syntax match   jsGlobalObjects  /\%(Intl\.\)\@<=\(Collator\|DateTimeFormat\|NumberFormat\)/
-
-syntax keyword jsExceptions     Error EvalError InternalError RangeError ReferenceError StopIteration SyntaxError TypeError URIError
-
-syntax keyword jsBuiltins       decodeURI decodeURIComponent encodeURI encodeURIComponent eval isFinite isNaN parseFloat parseInt uneval
-
-syntax keyword jsFutureKeys     abstract enum int short boolean export interface static byte extends long super char final native synchronized class float package throws goto private transient debugger implements protected volatile double import public
-
-"" DOM/HTML/CSS specified things
-
-  " DOM2 Objects
-  syntax keyword jsGlobalObjects  DOMImplementation DocumentFragment Document Node NodeList NamedNodeMap CharacterData Attr Element Text Comment CDATASection DocumentType Notation Entity EntityReference ProcessingInstruction
-  syntax keyword jsExceptions     DOMException
-
-  " DOM2 CONSTANT
-  syntax keyword jsDomErrNo       INDEX_SIZE_ERR DOMSTRING_SIZE_ERR HIERARCHY_REQUEST_ERR WRONG_DOCUMENT_ERR INVALID_CHARACTER_ERR NO_DATA_ALLOWED_ERR NO_MODIFICATION_ALLOWED_ERR NOT_FOUND_ERR NOT_SUPPORTED_ERR INUSE_ATTRIBUTE_ERR INVALID_STATE_ERR SYNTAX_ERR INVALID_MODIFICATION_ERR NAMESPACE_ERR INVALID_ACCESS_ERR
-  syntax keyword jsDomNodeConsts  ELEMENT_NODE ATTRIBUTE_NODE TEXT_NODE CDATA_SECTION_NODE ENTITY_REFERENCE_NODE ENTITY_NODE PROCESSING_INSTRUCTION_NODE COMMENT_NODE DOCUMENT_NODE DOCUMENT_TYPE_NODE DOCUMENT_FRAGMENT_NODE NOTATION_NODE
-
-  " HTML events and internal variables
-  syntax case ignore
-  syntax keyword jsHtmlEvents     onblur onclick oncontextmenu ondblclick onfocus onkeydown onkeypress onkeyup onmousedown onmousemove onmouseout onmouseover onmouseup onresize
-  syntax case match
-
-" Follow stuff should be highligh within a special context
-" While it can't be handled with context depended with Regex based highlight
-" So, turn it off by default
-if exists("javascript_enable_domhtmlcss")
-
-    " DOM2 things
-    syntax match jsDomElemAttrs     contained /\%(nodeName\|nodeValue\|nodeType\|parentNode\|childNodes\|firstChild\|lastChild\|previousSibling\|nextSibling\|attributes\|ownerDocument\|namespaceURI\|prefix\|localName\|tagName\)\>/
-    syntax match jsDomElemFuncs     contained /\%(insertBefore\|replaceChild\|removeChild\|appendChild\|hasChildNodes\|cloneNode\|normalize\|isSupported\|hasAttributes\|getAttribute\|setAttribute\|removeAttribute\|getAttributeNode\|setAttributeNode\|removeAttributeNode\|getElementsByTagName\|getAttributeNS\|setAttributeNS\|removeAttributeNS\|getAttributeNodeNS\|setAttributeNodeNS\|getElementsByTagNameNS\|hasAttribute\|hasAttributeNS\)\>/ nextgroup=jsParen skipwhite
-    " HTML things
-    syntax match jsHtmlElemAttrs    contained /\%(className\|clientHeight\|clientLeft\|clientTop\|clientWidth\|dir\|id\|innerHTML\|lang\|length\|offsetHeight\|offsetLeft\|offsetParent\|offsetTop\|offsetWidth\|scrollHeight\|scrollLeft\|scrollTop\|scrollWidth\|style\|tabIndex\|title\)\>/
-    syntax match jsHtmlElemFuncs    contained /\%(blur\|click\|focus\|scrollIntoView\|addEventListener\|dispatchEvent\|removeEventListener\|item\)\>/ nextgroup=jsParen skipwhite
-
-    " CSS Styles in JavaScript
-    syntax keyword jsCssStyles      contained color font fontFamily fontSize fontSizeAdjust fontStretch fontStyle fontVariant fontWeight letterSpacing lineBreak lineHeight quotes rubyAlign rubyOverhang rubyPosition
-    syntax keyword jsCssStyles      contained textAlign textAlignLast textAutospace textDecoration textIndent textJustify textJustifyTrim textKashidaSpace textOverflowW6 textShadow textTransform textUnderlinePosition
-    syntax keyword jsCssStyles      contained unicodeBidi whiteSpace wordBreak wordSpacing wordWrap writingMode
-    syntax keyword jsCssStyles      contained bottom height left position right top width zIndex
-    syntax keyword jsCssStyles      contained border borderBottom borderLeft borderRight borderTop borderBottomColor borderLeftColor borderTopColor borderBottomStyle borderLeftStyle borderRightStyle borderTopStyle borderBottomWidth borderLeftWidth borderRightWidth borderTopWidth borderColor borderStyle borderWidth borderCollapse borderSpacing captionSide emptyCells tableLayout
-    syntax keyword jsCssStyles      contained margin marginBottom marginLeft marginRight marginTop outline outlineColor outlineStyle outlineWidth padding paddingBottom paddingLeft paddingRight paddingTop
-    syntax keyword jsCssStyles      contained listStyle listStyleImage listStylePosition listStyleType
-    syntax keyword jsCssStyles      contained background backgroundAttachment backgroundColor backgroundImage gackgroundPosition backgroundPositionX backgroundPositionY backgroundRepeat
-    syntax keyword jsCssStyles      contained clear clip clipBottom clipLeft clipRight clipTop content counterIncrement counterReset cssFloat cursor direction display filter layoutGrid layoutGridChar layoutGridLine layoutGridMode layoutGridType
-    syntax keyword jsCssStyles      contained marks maxHeight maxWidth minHeight minWidth opacity MozOpacity overflow overflowX overflowY verticalAlign visibility zoom cssText
-    syntax keyword jsCssStyles      contained scrollbar3dLightColor scrollbarArrowColor scrollbarBaseColor scrollbarDarkShadowColor scrollbarFaceColor scrollbarHighlightColor scrollbarShadowColor scrollbarTrackColor
-
-    " Highlight ways
-    syntax match jsDotNotation      "\." nextgroup=jsPrototype,jsDomElemAttrs,jsDomElemFuncs,jsHtmlElemAttrs,jsHtmlElemFuncs
-    syntax match jsDotNotation      "\.style\." nextgroup=jsCssStyles
-
-endif "DOM/HTML/CSS
-
-"" end DOM/HTML/CSS specified things
-
-
-"" Code blocks
-syntax cluster jsExpression contains=jsComment,jsLineComment,jsDocComment,jsStringD,jsStringS,jsRegexpString,jsNumber,jsFloat,jsThis,jsOperator,jsBooleanTrue,jsBooleanFalse,jsNull,jsFunction,jsGlobalObjects,jsExceptions,jsFutureKeys,jsDomErrNo,jsDomNodeConsts,jsHtmlEvents,jsDotNotation,jsBracket,jsParen,jsBlock,jsFuncCall,jsUndefined,jsNan,jsKeyword,jsStorageClass,jsPrototype,jsBuiltins,jsNoise
-syntax cluster jsAll        contains=@jsExpression,jsLabel,jsConditional,jsRepeat,jsReturn,jsStatement,jsTernaryIf,jsException
-syntax region  jsBracket    matchgroup=jsBrackets     start="\[" end="\]" contains=@jsAll,jsParensErrB,jsParensErrC,jsBracket,jsParen,jsBlock,@htmlPreproc fold
-syntax region  jsParen      matchgroup=jsParens       start="("  end=")"  contains=@jsAll,jsParensErrA,jsParensErrC,jsParen,jsBracket,jsBlock,@htmlPreproc fold
-syntax region  jsBlock      matchgroup=jsBraces       start="{"  end="}"  contains=@jsAll,jsParensErrA,jsParensErrB,jsParen,jsBracket,jsBlock,jsObjectKey,@htmlPreproc fold
-syntax region  jsFuncBlock  matchgroup=jsFuncBraces   start="{"  end="}"  contains=@jsAll,jsParensErrA,jsParensErrB,jsParen,jsBracket,jsBlock,@htmlPreproc contained fold
-syntax region  jsTernaryIf  matchgroup=jsTernaryIfOperator start=+?+  end=+:+  contains=@jsExpression,jsTernaryIf
-
-"" catch errors caused by wrong parenthesis
-syntax match   jsParensError    ")\|}\|\]"
-syntax match   jsParensErrA     contained "\]"
-syntax match   jsParensErrB     contained ")"
-syntax match   jsParensErrC     contained "}"
-
-if main_syntax == "javascript"
-  syntax sync clear
-  syntax sync ccomment jsComment minlines=200
-  syntax sync match jsHighlight grouphere jsBlock /{/
+" Modules
+syntax keyword jsImport                       import skipwhite skipempty nextgroup=jsModuleAsterisk,jsModuleKeyword,jsModuleGroup,jsFlowImportType
+syntax keyword jsExport                       export skipwhite skipempty nextgroup=@jsAll,jsModuleGroup,jsExportDefault,jsModuleAsterisk,jsModuleKeyword,jsFlowTypeStatement
+syntax match   jsModuleKeyword      contained /\<\K\k*/ skipwhite skipempty nextgroup=jsModuleAs,jsFrom,jsModuleComma
+syntax keyword jsExportDefault      contained default skipwhite skipempty nextgroup=@jsExpression
+syntax keyword jsExportDefaultGroup contained default skipwhite skipempty nextgroup=jsModuleAs,jsFrom,jsModuleComma
+syntax match   jsModuleAsterisk     contained /\*/ skipwhite skipempty nextgroup=jsModuleKeyword,jsModuleAs,jsFrom
+syntax keyword jsModuleAs           contained as skipwhite skipempty nextgroup=jsModuleKeyword,jsExportDefaultGroup
+syntax keyword jsFrom               contained from skipwhite skipempty nextgroup=jsString
+syntax match   jsModuleComma        contained /,/ skipwhite skipempty nextgroup=jsModuleKeyword,jsModuleAsterisk,jsModuleGroup,jsFlowTypeKeyword
+
+" Strings, Templates, Numbers
+syntax region  jsString           start=+\z(["']\)+  skip=+\\\%(\z1\|$\)+  end=+\z1+ end=+$+  contains=jsSpecial extend
+syntax region  jsTemplateString   start=+`+  skip=+\\`+  end=+`+     contains=jsTemplateExpression,jsSpecial extend
+syntax match   jsTaggedTemplate   /\<\K\k*\ze`/ nextgroup=jsTemplateString
+syntax match   jsNumber           /\c\<\%(\d\+\%(e[+-]\=\d\+\)\=\|0b[01]\+\|0o\o\+\|0x\%(\x\|_\)\+\)n\=\>/
+syntax keyword jsNumber           Infinity
+syntax match   jsFloat            /\c\<\%(\d\+\.\d\+\|\d\+\.\|\.\d\+\)\%(e[+-]\=\d\+\)\=\>/
+
+" Regular Expressions
+syntax match   jsSpecial            contained "\v\\%(x\x\x|u%(\x{4}|\{\x{4,5}})|c\u|.)"
+syntax region  jsTemplateExpression contained matchgroup=jsTemplateBraces start=+${+ end=+}+ contains=@jsExpression keepend
+syntax region  jsRegexpCharClass    contained start=+\[+ skip=+\\.+ end=+\]+ contains=jsSpecial extend
+syntax match   jsRegexpBoundary     contained "\v\c[$^]|\\b"
+syntax match   jsRegexpBackRef      contained "\v\\[1-9]\d*"
+syntax match   jsRegexpQuantifier   contained "\v[^\\]%([?*+]|\{\d+%(,\d*)?})\??"lc=1
+syntax match   jsRegexpOr           contained "|"
+syntax match   jsRegexpMod          contained "\v\(\?[:=!>]"lc=1
+syntax region  jsRegexpGroup        contained start="[^\\]("lc=1 skip="\\.\|\[\(\\.\|[^]]\+\)\]" end=")" contains=jsRegexpCharClass,@jsRegexpSpecial keepend
+syntax region  jsRegexpString   start=+\%(\%(\<return\|\<typeof\|\_[^)\]'"[:blank:][:alnum:]_$]\)\s*\)\@<=/\ze[^*/]+ skip=+\\.\|\[[^]]\{1,}\]+ end=+/[gimyus]\{,6}+ contains=jsRegexpCharClass,jsRegexpGroup,@jsRegexpSpecial oneline keepend extend
+syntax cluster jsRegexpSpecial    contains=jsSpecial,jsRegexpBoundary,jsRegexpBackRef,jsRegexpQuantifier,jsRegexpOr,jsRegexpMod
+
+" Objects
+syntax match   jsObjectShorthandProp contained /\<\k*\ze\s*/ skipwhite skipempty nextgroup=jsObjectSeparator
+syntax match   jsObjectKey         contained /\<\k*\ze\s*:/ contains=jsFunctionKey skipwhite skipempty nextgroup=jsObjectValue
+syntax region  jsObjectKeyString   contained start=+\z(["']\)+  skip=+\\\%(\z1\|$\)+  end=+\z1\|$+  contains=jsSpecial skipwhite skipempty nextgroup=jsObjectValue
+syntax region  jsObjectKeyComputed contained matchgroup=jsBrackets start=/\[/ end=/]/ contains=@jsExpression skipwhite skipempty nextgroup=jsObjectValue,jsFuncArgs extend
+syntax match   jsObjectSeparator   contained /,/
+syntax region  jsObjectValue       contained matchgroup=jsObjectColon start=/:/ end=/[,}]\@=/ contains=@jsExpression extend
+syntax match   jsObjectFuncName    contained /\<\K\k*\ze\_s*(/ skipwhite skipempty nextgroup=jsFuncArgs
+syntax match   jsFunctionKey       contained /\<\K\k*\ze\s*:\s*function\>/
+syntax match   jsObjectMethodType  contained /\<[gs]et\ze\s\+\K\k*/ skipwhite skipempty nextgroup=jsObjectFuncName
+syntax region  jsObjectStringKey   contained start=+\z(["']\)+  skip=+\\\%(\z1\|$\)+  end=+\z1\|$+  contains=jsSpecial extend skipwhite skipempty nextgroup=jsFuncArgs,jsObjectValue
+
+exe 'syntax keyword jsNull      null             '.(exists('g:javascript_conceal_null')      ? 'conceal cchar='.g:javascript_conceal_null       : '')
+exe 'syntax keyword jsReturn    return contained '.(exists('g:javascript_conceal_return')    ? 'conceal cchar='.g:javascript_conceal_return     : '').' skipwhite nextgroup=@jsExpression'
+exe 'syntax keyword jsUndefined undefined        '.(exists('g:javascript_conceal_undefined') ? 'conceal cchar='.g:javascript_conceal_undefined  : '')
+exe 'syntax keyword jsNan       NaN              '.(exists('g:javascript_conceal_NaN')       ? 'conceal cchar='.g:javascript_conceal_NaN        : '')
+exe 'syntax keyword jsPrototype prototype        '.(exists('g:javascript_conceal_prototype') ? 'conceal cchar='.g:javascript_conceal_prototype  : '')
+exe 'syntax keyword jsThis      this             '.(exists('g:javascript_conceal_this')      ? 'conceal cchar='.g:javascript_conceal_this       : '')
+exe 'syntax keyword jsSuper     super  contained '.(exists('g:javascript_conceal_super')     ? 'conceal cchar='.g:javascript_conceal_super      : '')
+
+" Statement Keywords
+syntax match   jsBlockLabel              /\<\K\k*\s*::\@!/    contains=jsNoise skipwhite skipempty nextgroup=jsBlock
+syntax match   jsBlockLabelKey contained /\<\K\k*\ze\s*\_[;]/
+syntax keyword jsStatement     contained with yield debugger
+syntax keyword jsStatement     contained break continue skipwhite skipempty nextgroup=jsBlockLabelKey
+syntax keyword jsConditional            if              skipwhite skipempty nextgroup=jsParenIfElse
+syntax keyword jsConditional            else            skipwhite skipempty nextgroup=jsCommentIfElse,jsIfElseBlock
+syntax keyword jsConditional            switch          skipwhite skipempty nextgroup=jsParenSwitch
+syntax keyword jsWhile                  while           skipwhite skipempty nextgroup=jsParenWhile
+syntax keyword jsFor                    for             skipwhite skipempty nextgroup=jsParenFor,jsForAwait
+syntax keyword jsDo                     do              skipwhite skipempty nextgroup=jsRepeatBlock
+syntax region  jsSwitchCase   contained matchgroup=jsLabel start=/\<\%(case\|default\)\>/ end=/:\@=/ contains=@jsExpression,jsLabel skipwhite skipempty nextgroup=jsSwitchColon keepend
+syntax keyword jsTry                    try             skipwhite skipempty nextgroup=jsTryCatchBlock
+syntax keyword jsFinally      contained finally         skipwhite skipempty nextgroup=jsFinallyBlock
+syntax keyword jsCatch        contained catch           skipwhite skipempty nextgroup=jsParenCatch,jsTryCatchBlock
+syntax keyword jsException              throw
+syntax keyword jsAsyncKeyword           async await
+syntax match   jsSwitchColon   contained /::\@!/        skipwhite skipempty nextgroup=jsSwitchBlock
+
+" Keywords
+syntax keyword jsGlobalObjects     ArrayBuffer Array BigInt BigInt64Array BigUint64Array Float32Array Float64Array Int16Array Int32Array Int8Array Uint16Array Uint32Array Uint8Array Uint8ClampedArray Boolean Buffer Collator DataView Date DateTimeFormat Function Intl Iterator JSON Map Set WeakMap WeakRef WeakSet Math Number NumberFormat Object ParallelArray Promise Proxy Reflect RegExp String Symbol Uint8ClampedArray WebAssembly console document fetch window
+syntax keyword jsGlobalNodeObjects  module exports global process __dirname __filename
+syntax match   jsGlobalNodeObjects  /\<require\>/ containedin=jsFuncCall
+syntax keyword jsExceptions         Error EvalError InternalError RangeError ReferenceError StopIteration SyntaxError TypeError URIError
+syntax keyword jsBuiltins           decodeURI decodeURIComponent encodeURI encodeURIComponent eval isFinite isNaN parseFloat parseInt uneval
+" DISCUSS: How imporant is this, really? Perhaps it should be linked to an error because I assume the keywords are reserved?
+syntax keyword jsFutureKeys         abstract enum int short boolean interface byte long char final native synchronized float package throws goto private transient implements protected volatile double public
+
+" DISCUSS: Should we really be matching stuff like this?
+" DOM2 Objects
+syntax keyword jsGlobalObjects  DOMImplementation DocumentFragment Document Node NodeList NamedNodeMap CharacterData Attr Element Text Comment CDATASection DocumentType Notation Entity EntityReference ProcessingInstruction
+syntax keyword jsExceptions     DOMException
+
+" DISCUSS: Should we really be matching stuff like this?
+" DOM2 CONSTANT
+syntax keyword jsDomErrNo       INDEX_SIZE_ERR DOMSTRING_SIZE_ERR HIERARCHY_REQUEST_ERR WRONG_DOCUMENT_ERR INVALID_CHARACTER_ERR NO_DATA_ALLOWED_ERR NO_MODIFICATION_ALLOWED_ERR NOT_FOUND_ERR NOT_SUPPORTED_ERR INUSE_ATTRIBUTE_ERR INVALID_STATE_ERR SYNTAX_ERR INVALID_MODIFICATION_ERR NAMESPACE_ERR INVALID_ACCESS_ERR
+syntax keyword jsDomNodeConsts  ELEMENT_NODE ATTRIBUTE_NODE TEXT_NODE CDATA_SECTION_NODE ENTITY_REFERENCE_NODE ENTITY_NODE PROCESSING_INSTRUCTION_NODE COMMENT_NODE DOCUMENT_NODE DOCUMENT_TYPE_NODE DOCUMENT_FRAGMENT_NODE NOTATION_NODE
+
+" DISCUSS: Should we really be special matching on these props?
+" HTML events and internal variables
+syntax keyword jsHtmlEvents     onblur onclick oncontextmenu ondblclick onfocus onkeydown onkeypress onkeyup onmousedown onmousemove onmouseout onmouseover onmouseup onresize
+
+" Code blocks
+syntax region  jsBracket                      matchgroup=jsBrackets            start=/\[/ end=/\]/ contains=@jsExpression,jsSpreadExpression extend fold
+syntax region  jsParen                        matchgroup=jsParens              start=/(/  end=/)/  contains=@jsExpression extend fold nextgroup=jsFlowDefinition
+syntax region  jsParenDecorator     contained matchgroup=jsParensDecorator     start=/(/  end=/)/  contains=@jsExpression extend fold
+syntax region  jsParenIfElse        contained matchgroup=jsParensIfElse        start=/(/  end=/)/  contains=@jsExpression skipwhite skipempty nextgroup=jsCommentIfElse,jsIfElseBlock,jsReturn extend fold
+syntax region  jsParenWhile         contained matchgroup=jsParensWhile         start=/(/  end=/)/  contains=@jsExpression skipwhite skipempty nextgroup=jsCommentRepeat,jsRepeatBlock,jsReturn extend fold
+syntax region  jsParenFor           contained matchgroup=jsParensFor           start=/(/  end=/)/  contains=@jsExpression,jsStorageClass,jsOf skipwhite skipempty nextgroup=jsCommentRepeat,jsRepeatBlock,jsReturn extend fold
+syntax region  jsParenSwitch        contained matchgroup=jsParensSwitch        start=/(/  end=/)/  contains=@jsExpression skipwhite skipempty nextgroup=jsSwitchBlock extend fold
+syntax region  jsParenCatch         contained matchgroup=jsParensCatch         start=/(/  end=/)/  skipwhite skipempty nextgroup=jsTryCatchBlock extend fold
+syntax region  jsFuncArgs           contained matchgroup=jsFuncParens          start=/(/  end=/)/  contains=jsFuncArgCommas,jsComment,jsFuncArgExpression,jsDestructuringBlock,jsDestructuringArray,jsRestExpression,jsFlowArgumentDef skipwhite skipempty nextgroup=jsCommentFunction,jsFuncBlock,jsFlowReturn extend fold
+syntax region  jsClassBlock         contained matchgroup=jsClassBraces         start=/{/  end=/}/  contains=jsClassFuncName,jsClassMethodType,jsArrowFunction,jsArrowFuncArgs,jsComment,jsGenerator,jsDecorator,jsClassProperty,jsClassPropertyComputed,jsClassStringKey,jsAsyncKeyword,jsNoise extend fold
+syntax region  jsFuncBlock          contained matchgroup=jsFuncBraces          start=/{/  end=/}/  contains=@jsAll extend fold
+syntax region  jsIfElseBlock        contained matchgroup=jsIfElseBraces        start=/{/  end=/}/  contains=@jsAll extend fold
+syntax region  jsTryCatchBlock      contained matchgroup=jsTryCatchBraces      start=/{/  end=/}/  contains=@jsAll skipwhite skipempty nextgroup=jsCatch,jsFinally extend fold
+syntax region  jsFinallyBlock       contained matchgroup=jsFinallyBraces       start=/{/  end=/}/  contains=@jsAll extend fold
+syntax region  jsSwitchBlock        contained matchgroup=jsSwitchBraces        start=/{/  end=/}/  contains=@jsAll,jsSwitchCase extend fold
+syntax region  jsRepeatBlock        contained matchgroup=jsRepeatBraces        start=/{/  end=/}/  contains=@jsAll extend fold
+syntax region  jsDestructuringBlock contained matchgroup=jsDestructuringBraces start=/{/  end=/}/  contains=jsDestructuringProperty,jsDestructuringAssignment,jsDestructuringNoise,jsDestructuringPropertyComputed,jsSpreadExpression,jsComment nextgroup=jsFlowDefinition extend fold
+syntax region  jsDestructuringArray contained matchgroup=jsDestructuringBraces start=/\[/ end=/\]/ contains=jsDestructuringPropertyValue,jsDestructuringNoise,jsDestructuringProperty,jsSpreadExpression,jsDestructuringBlock,jsDestructuringArray,jsComment nextgroup=jsFlowDefinition extend fold
+syntax region  jsObject             contained matchgroup=jsObjectBraces        start=/{/  end=/}/  contains=jsObjectKey,jsObjectKeyString,jsObjectKeyComputed,jsObjectShorthandProp,jsObjectSeparator,jsObjectFuncName,jsObjectMethodType,jsGenerator,jsComment,jsObjectStringKey,jsSpreadExpression,jsDecorator,jsAsyncKeyword,jsTemplateString extend fold
+syntax region  jsBlock                        matchgroup=jsBraces              start=/{/  end=/}/  contains=@jsAll,jsSpreadExpression extend fold
+syntax region  jsModuleGroup        contained matchgroup=jsModuleBraces        start=/{/ end=/}/   contains=jsModuleKeyword,jsModuleComma,jsModuleAs,jsComment,jsFlowTypeKeyword skipwhite skipempty nextgroup=jsFrom fold
+syntax region  jsSpreadExpression   contained matchgroup=jsSpreadOperator      start=/\.\.\./ end=/[,}\]]\@=/ contains=@jsExpression
+syntax region  jsRestExpression     contained matchgroup=jsRestOperator        start=/\.\.\./ end=/[,)]\@=/
+syntax region  jsTernaryIf                    matchgroup=jsTernaryIfOperator   start=/?:\@!/  end=/\%(:\|}\@=\)/  contains=@jsExpression extend skipwhite skipempty nextgroup=@jsExpression
+" These must occur here or they will be override by jsTernaryIf
+syntax match   jsOperator           /?\.\ze\_D/
+syntax match   jsOperator           /??/ skipwhite skipempty nextgroup=@jsExpression
+
+syntax match   jsGenerator            contained /\*/ skipwhite skipempty nextgroup=jsFuncName,jsFuncArgs,jsFlowFunctionGroup
+syntax match   jsFuncName             contained /\<\K\k*/ skipwhite skipempty nextgroup=jsFuncArgs,jsFlowFunctionGroup
+syntax region  jsFuncArgExpression    contained matchgroup=jsFuncArgOperator start=/=/ end=/[,)]\@=/ contains=@jsExpression extend
+syntax match   jsFuncArgCommas        contained ','
+syntax keyword jsArguments            contained arguments
+syntax keyword jsForAwait             contained await skipwhite skipempty nextgroup=jsParenFor
+
+" Matches a single keyword argument with no parens
+syntax match   jsArrowFuncArgs  /\<\K\k*\ze\s*=>/ skipwhite contains=jsFuncArgs skipwhite skipempty nextgroup=jsArrowFunction extend
+" Matches a series of arguments surrounded in parens
+syntax match   jsArrowFuncArgs  /([^()]*)\ze\s*=>/ contains=jsFuncArgs skipempty skipwhite nextgroup=jsArrowFunction extend
+
+exe 'syntax match jsFunction /\<function\>/      skipwhite skipempty nextgroup=jsGenerator,jsFuncName,jsFuncArgs,jsFlowFunctionGroup skipwhite '.(exists('g:javascript_conceal_function') ? 'conceal cchar='.g:javascript_conceal_function : '')
+exe 'syntax match jsArrowFunction /=>/           skipwhite skipempty nextgroup=jsFuncBlock,jsCommentFunction '.(exists('g:javascript_conceal_arrow_function') ? 'conceal cchar='.g:javascript_conceal_arrow_function : '')
+exe 'syntax match jsArrowFunction /()\ze\s*=>/   skipwhite skipempty nextgroup=jsArrowFunction '.(exists('g:javascript_conceal_noarg_arrow_function') ? 'conceal cchar='.g:javascript_conceal_noarg_arrow_function : '')
+exe 'syntax match jsArrowFunction /_\ze\s*=>/    skipwhite skipempty nextgroup=jsArrowFunction '.(exists('g:javascript_conceal_underscore_arrow_function') ? 'conceal cchar='.g:javascript_conceal_underscore_arrow_function : '')
+
+" Classes
+syntax keyword jsClassKeyword           contained class
+syntax keyword jsExtendsKeyword         contained extends skipwhite skipempty nextgroup=@jsExpression
+syntax match   jsClassNoise             contained /\./
+syntax match   jsClassFuncName          contained /\<\K\k*\ze\s*[(<]/ skipwhite skipempty nextgroup=jsFuncArgs,jsFlowClassFunctionGroup
+syntax match   jsClassMethodType        contained /\<\%([gs]et\|static\)\ze\s\+\K\k*/ skipwhite skipempty nextgroup=jsAsyncKeyword,jsClassFuncName,jsClassProperty
+syntax region  jsClassDefinition                  start=/\<class\>/ end=/\(\<extends\>\s\+\)\@<!{\@=/ contains=jsClassKeyword,jsExtendsKeyword,jsClassNoise,@jsExpression,jsFlowClassGroup skipwhite skipempty nextgroup=jsCommentClass,jsClassBlock,jsFlowClassGroup
+syntax match   jsClassProperty          contained /\<\K\k*\ze\s*[=;]/ skipwhite skipempty nextgroup=jsClassValue,jsFlowClassDef
+syntax region  jsClassValue             contained start=/=/ end=/\_[;}]\@=/ contains=@jsExpression
+syntax region  jsClassPropertyComputed  contained matchgroup=jsBrackets start=/\[/ end=/]/ contains=@jsExpression skipwhite skipempty nextgroup=jsFuncArgs,jsClassValue extend
+syntax region  jsClassStringKey         contained start=+\z(["']\)+  skip=+\\\%(\z1\|$\)+  end=+\z1\|$+  contains=jsSpecial extend skipwhite skipempty nextgroup=jsFuncArgs
+
+" Destructuring
+syntax match   jsDestructuringPropertyValue     contained /\k\+/
+syntax match   jsDestructuringProperty          contained /\k\+\ze\s*=/ skipwhite skipempty nextgroup=jsDestructuringValue
+syntax match   jsDestructuringAssignment        contained /\k\+\ze\s*:/ skipwhite skipempty nextgroup=jsDestructuringValueAssignment
+syntax region  jsDestructuringValue             contained start=/=/ end=/[,}\]]\@=/ contains=@jsExpression extend
+syntax region  jsDestructuringValueAssignment   contained start=/:/ end=/[,}=]\@=/ contains=jsDestructuringPropertyValue,jsDestructuringBlock,jsNoise,jsDestructuringNoise skipwhite skipempty nextgroup=jsDestructuringValue extend
+syntax match   jsDestructuringNoise             contained /[,[\]]/
+syntax region  jsDestructuringPropertyComputed  contained matchgroup=jsDestructuringBraces start=/\[/ end=/]/ contains=@jsExpression skipwhite skipempty nextgroup=jsDestructuringValue,jsDestructuringValueAssignment,jsDestructuringNoise extend fold
+
+" Comments
+syntax keyword jsCommentTodo    contained TODO FIXME XXX TBD NOTE
+syntax region  jsComment        start=+//+ end=/$/ contains=jsCommentTodo,@Spell extend keepend
+syntax region  jsComment        start=+/\*+  end=+\*/+ contains=jsCommentTodo,@Spell fold extend keepend
+syntax region  jsEnvComment     start=/\%^#!/ end=/$/ display
+
+" Specialized Comments - These are special comment regexes that are used in
+" odd places that maintain the proper nextgroup functionality. It sucks we
+" can't make jsComment a skippable type of group for nextgroup
+syntax region  jsCommentFunction    contained start=+//+ end=/$/    contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturn extend keepend
+syntax region  jsCommentFunction    contained start=+/\*+ end=+\*/+ contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturn fold extend keepend
+syntax region  jsCommentClass       contained start=+//+ end=/$/    contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsClassBlock,jsFlowClassGroup extend keepend
+syntax region  jsCommentClass       contained start=+/\*+ end=+\*/+ contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsClassBlock,jsFlowClassGroup fold extend keepend
+syntax region  jsCommentIfElse      contained start=+//+ end=/$/    contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsIfElseBlock extend keepend
+syntax region  jsCommentIfElse      contained start=+/\*+ end=+\*/+ contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsIfElseBlock fold extend keepend
+syntax region  jsCommentRepeat      contained start=+//+ end=/$/    contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsRepeatBlock extend keepend
+syntax region  jsCommentRepeat      contained start=+/\*+ end=+\*/+ contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsRepeatBlock fold extend keepend
+
+" Decorators
+syntax match   jsDecorator                    /^\s*@/ nextgroup=jsDecoratorFunction
+syntax match   jsDecoratorFunction  contained /\h[a-zA-Z0-9_.]*/ nextgroup=jsParenDecorator
+
+if exists("javascript_plugin_jsdoc")
+  runtime extras/jsdoc.vim
+  " NGDoc requires JSDoc
+  if exists("javascript_plugin_ngdoc")
+    runtime extras/ngdoc.vim
+  endif
 endif
 
-if g:javascript_conceal == 1
-  syntax match   jsFunction       /\<function\>/ nextgroup=jsFuncName,jsFuncArgs skipwhite conceal cchar=ƒ
-else
-  syntax match   jsFunction       /\<function\>/ nextgroup=jsFuncName,jsFuncArgs skipwhite
+if exists("javascript_plugin_flow")
+  runtime extras/flow.vim
 endif
 
-syntax match   jsFuncName       contained /\<[a-zA-Z_$][0-9a-zA-Z_$]*/ nextgroup=jsFuncArgs skipwhite
-syntax region  jsFuncArgs       contained matchgroup=jsFuncParens start='(' end=')' contains=jsFuncArgCommas nextgroup=jsFuncBlock keepend skipwhite skipempty
-syntax match   jsFuncArgCommas  contained ','
-syntax keyword jsArgsObj        arguments contained containedin=jsFuncBlock
+syntax cluster jsExpression  contains=jsBracket,jsParen,jsObject,jsTernaryIf,jsTaggedTemplate,jsTemplateString,jsString,jsRegexpString,jsNumber,jsFloat,jsOperator,jsOperatorKeyword,jsBooleanTrue,jsBooleanFalse,jsNull,jsFunction,jsArrowFunction,jsGlobalObjects,jsExceptions,jsFutureKeys,jsDomErrNo,jsDomNodeConsts,jsHtmlEvents,jsFuncCall,jsUndefined,jsNan,jsPrototype,jsBuiltins,jsNoise,jsClassDefinition,jsArrowFunction,jsArrowFuncArgs,jsParensError,jsComment,jsArguments,jsThis,jsSuper,jsDo,jsForAwait,jsAsyncKeyword,jsStatement,jsDot
+syntax cluster jsAll         contains=@jsExpression,jsStorageClass,jsConditional,jsWhile,jsFor,jsReturn,jsException,jsTry,jsNoise,jsBlockLabel,jsBlock
 
 " Define the default highlighting.
 " For version 5.7 and earlier: only when not done already
@@ -223,19 +250,21 @@ if version >= 508 || !exists("did_javascript_syn_inits")
     command -nargs=+ HiLink hi def link <args>
   endif
   HiLink jsComment              Comment
-  HiLink jsLineComment          Comment
   HiLink jsEnvComment           PreProc
-  HiLink jsDocComment           Comment
+  HiLink jsParensIfElse         jsParens
+  HiLink jsParensWhile          jsParensRepeat
+  HiLink jsParensFor            jsParensRepeat
+  HiLink jsParensRepeat         jsParens
+  HiLink jsParensSwitch         jsParens
+  HiLink jsParensCatch          jsParens
   HiLink jsCommentTodo          Todo
-  HiLink jsCvsTag               Function
-  HiLink jsDocTags              Special
-  HiLink jsDocSeeTag            Function
-  HiLink jsDocType              Type
-  HiLink jsDocTypeNoParam       Type
-  HiLink jsDocParam             Label
-  HiLink jsStringS              String
-  HiLink jsStringD              String
-  HiLink jsTernaryIfOperator    Conditional
+  HiLink jsString               String
+  HiLink jsObjectKeyString      String
+  HiLink jsTemplateString       String
+  HiLink jsObjectStringKey      String
+  HiLink jsClassStringKey       String
+  HiLink jsTaggedTemplate       StorageClass
+  HiLink jsTernaryIfOperator    Operator
   HiLink jsRegexpString         String
   HiLink jsRegexpBoundary       SpecialChar
   HiLink jsRegexpQuantifier     SpecialChar
@@ -250,21 +279,36 @@ if version >= 508 || !exists("did_javascript_syn_inits")
   HiLink jsBranch               Conditional
   HiLink jsLabel                Label
   HiLink jsReturn               Statement
+  HiLink jsWhile                jsRepeat
+  HiLink jsFor                  jsRepeat
   HiLink jsRepeat               Repeat
+  HiLink jsDo                   Repeat
   HiLink jsStatement            Statement
   HiLink jsException            Exception
-  HiLink jsKeyword              Keyword
+  HiLink jsTry                  Exception
+  HiLink jsFinally              Exception
+  HiLink jsCatch                Exception
+  HiLink jsAsyncKeyword         Keyword
+  HiLink jsForAwait             Keyword
+  HiLink jsArrowFunction        Type
   HiLink jsFunction             Type
+  HiLink jsGenerator            jsFunction
+  HiLink jsArrowFuncArgs        jsFuncArgs
   HiLink jsFuncName             Function
-  HiLink jsArgsObj              Special
+  HiLink jsFuncCall             Function
+  HiLink jsClassFuncName        jsFuncName
+  HiLink jsObjectFuncName       Function
+  HiLink jsArguments            Special
   HiLink jsError                Error
   HiLink jsParensError          Error
-  HiLink jsParensErrA           Error
-  HiLink jsParensErrB           Error
-  HiLink jsParensErrC           Error
+  HiLink jsOperatorKeyword      jsOperator
   HiLink jsOperator             Operator
+  HiLink jsOf                   Operator
   HiLink jsStorageClass         StorageClass
+  HiLink jsClassKeyword         Keyword
+  HiLink jsExtendsKeyword       Keyword
   HiLink jsThis                 Special
+  HiLink jsSuper                Constant
   HiLink jsNan                  Number
   HiLink jsNull                 Type
   HiLink jsUndefined            Type
@@ -272,17 +316,63 @@ if version >= 508 || !exists("did_javascript_syn_inits")
   HiLink jsFloat                Float
   HiLink jsBooleanTrue          Boolean
   HiLink jsBooleanFalse         Boolean
+  HiLink jsObjectColon          jsNoise
   HiLink jsNoise                Noise
+  HiLink jsDot                  Noise
   HiLink jsBrackets             Noise
   HiLink jsParens               Noise
   HiLink jsBraces               Noise
   HiLink jsFuncBraces           Noise
   HiLink jsFuncParens           Noise
+  HiLink jsClassBraces          Noise
+  HiLink jsClassNoise           Noise
+  HiLink jsIfElseBraces         Noise
+  HiLink jsTryCatchBraces       Noise
+  HiLink jsModuleBraces         Noise
+  HiLink jsObjectBraces         Noise
+  HiLink jsObjectSeparator      Noise
+  HiLink jsFinallyBraces        Noise
+  HiLink jsRepeatBraces         Noise
+  HiLink jsSwitchBraces         Noise
   HiLink jsSpecial              Special
-  HiLink jsGlobalObjects        Special
-  HiLink jsExceptions           Special
-  HiLink jsFutureKeys           Special
-  HiLink jsBuiltins             Special
+  HiLink jsTemplateBraces       Noise
+  HiLink jsGlobalObjects        Constant
+  HiLink jsGlobalNodeObjects    Constant
+  HiLink jsExceptions           Constant
+  HiLink jsBuiltins             Constant
+  HiLink jsImport               Include
+  HiLink jsExport               Include
+  HiLink jsExportDefault        StorageClass
+  HiLink jsExportDefaultGroup   jsExportDefault
+  HiLink jsModuleAs             Include
+  HiLink jsModuleComma          jsNoise
+  HiLink jsModuleAsterisk       Noise
+  HiLink jsFrom                 Include
+  HiLink jsDecorator            Special
+  HiLink jsDecoratorFunction    Function
+  HiLink jsParensDecorator      jsParens
+  HiLink jsFuncArgOperator      jsFuncArgs
+  HiLink jsClassProperty        jsObjectKey
+  HiLink jsObjectShorthandProp  jsObjectKey
+  HiLink jsSpreadOperator       Operator
+  HiLink jsRestOperator         Operator
+  HiLink jsRestExpression       jsFuncArgs
+  HiLink jsSwitchColon          Noise
+  HiLink jsClassMethodType      Type
+  HiLink jsObjectMethodType     Type
+  HiLink jsClassDefinition      jsFuncName
+  HiLink jsBlockLabel           Identifier
+  HiLink jsBlockLabelKey        jsBlockLabel
+
+  HiLink jsDestructuringBraces     Noise
+  HiLink jsDestructuringProperty   jsFuncArgs
+  HiLink jsDestructuringAssignment jsObjectKey
+  HiLink jsDestructuringNoise      Noise
+
+  HiLink jsCommentFunction      jsComment
+  HiLink jsCommentClass         jsComment
+  HiLink jsCommentIfElse        jsComment
+  HiLink jsCommentRepeat        jsComment
 
   HiLink jsDomErrNo             Constant
   HiLink jsDomNodeConsts        Constant
@@ -299,10 +389,9 @@ if version >= 508 || !exists("did_javascript_syn_inits")
 endif
 
 " Define the htmlJavaScript for HTML syntax html.vim
-"syntax clear htmlJavaScript
-"syntax clear jsExpression
-syntax cluster  htmlJavaScript       contains=@jsAll,jsBracket,jsParen,jsBlock
-syntax cluster  javaScriptExpression contains=@jsAll,jsBracket,jsParen,jsBlock,@htmlPreproc
+syntax cluster  htmlJavaScript       contains=@jsAll,jsImport,jsExport
+syntax cluster  javaScriptExpression contains=@jsAll
+
 " Vim's default html.vim highlights all javascript as 'Special'
 hi! def link javaScript              NONE