extension.onRequest

Not implemented: 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() {...} // function
) {...})
chrome.extension.onRequest.removeListener(listener)
chrome.extension.onRequest.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)
Check whether listener is registered for this event. Returns true if it is listening, false otherwise.

addListener syntax

Parameters

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
runtime.MessageSender.
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 one onRequest listener in the same document, then only one may send a response.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxOperaFirefox for Android
Basic support
DeprecatedNon-standard
Chrome Full support YesEdge No support NoFirefox No support NoOpera Full support YesFirefox Android No support No

Legend

Full support  
Full support
No support  
No support
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.
Deprecated. Not for use in new websites.
Deprecated. Not for use in new websites.

Acknowledgements

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.

Document Tags and Contributors

Contributors to this page: Makyen, wbamberg, andymckay-github
Last updated by: Makyen,