"""
Communicate between Python and Javascript asynchronously using
inter-process messaging with the use of Javascript Bindings.
"""
from cefpython3 import cefpython as cef
g_htmlcode = """
Javascript Bindings
"""
def main():
cef.Initialize()
browser = cef.CreateBrowserSync(url=cef.GetDataUrl(g_htmlcode),
window_title="Javascript Bindings")
browser.SetClientHandler(LoadHandler())
bindings = cef.JavascriptBindings()
bindings.SetFunction("py_function", py_function)
bindings.SetFunction("py_callback", py_callback)
browser.SetJavascriptBindings(bindings)
cef.MessageLoop()
del browser
cef.Shutdown()
def py_function(value, js_callback):
print("Value sent from Javascript: "+value)
js_callback.Call("I am a Python string #2", py_callback)
def py_callback(value):
print("Value sent from Javascript: "+value)
class LoadHandler(object):
def OnLoadEnd(self, browser, **_):
browser.ExecuteFunction("js_function", "I am a Python string #1")
if __name__ == '__main__':
main()