extension.onRequest
Warning: This is not implemented in Firefox because it has been deprecated since Chrome 33. Please use runtime.onMessage instead.
Fired when a request is sent from either an extension process or a content script.
Syntax
chrome.extension.onRequest.addListener(function(
request, // optional any
sender, // runtime.MessageSender
() => {/* … */} // function
) {/* … */})
chrome.extension.onRequest.removeListener(listener)
chrome.extension.onRequest.hasListener(listener)
Events have three functions:
addListener(listener)
-
Adds a listener to this event.
removeListener(listener)
-
Stop listening to this event. The
listener
argument is the listener to remove. hasListener(listener)
-
Check whether
listener
is registered for this event. Returnstrue
if it is listening,false
otherwise.
addListener syntax
Parameters
listener
-
The function called when this event occurs. The function is passed these arguments:
request
-
any
. The request sent by the calling script. sender
sendResponse
-
function
. Function to call (at most once) when you have a response. The argument should be any JSON-ifiable object, or undefined if there is no response. If you have more than oneonRequest
listener in the same document, then only one may send a response.
Browser compatibility
BCD tables only load in the browser
Note: This API is based on Chromium's chrome.extension
API. This documentation is derived from extension.json
in the Chromium code.