警告： This is not implemented in Firefox because it has been deprecated since Chrome 33. Please use runtime.onMessageExternal 代替。
Fired when a request is sent from another extension.
chrome.extension.onRequestExternal.addListener(function(
request, // optional any
sender, // runtime.MessageSender
function() {...} // function
) {...})
chrome.extension.onRequestExternal.removeListener(listener)
chrome.extension.onRequestExternal.hasListener(listener)
Events have three functions:
addListener(callback)
Adds a listener to this event.
removeListener(listener)
Stop listening to this event. The
listener
argument is the listener to remove.
hasListener(listener)
校验是否
listener
is registered for this event. Returns
true
if it is listening,
false
否则。
callback
Function that will be called when this event occurs. The function will be passed the following arguments:
request
any
. The request sent by the calling script.
sender
sendResponse
function
. Function to call when you have a response. The argument should be any JSON-ifiable object, or undefined if there is no response.
BCD tables only load in the browser
注意：
This API is based on Chromium's
chrome.extension
API. This documentation is derived from
extension.json
in the Chromium code.
Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.
最后修改： , 由 MDN 贡献者