index.md

---

title: extension.sendRequest()
slug: Mozilla/Add-ons/WebExtensions/API/extension/sendRequest
page-type: webextension-api-function
tags:
  - API
  - Add-ons
  - Deprecated
  - Extension
  - Extensions
  - Method
  - Non-standard
  - Reference
  - WebExtensions
  - sendRequest
browser-compat: webextensions.api.extension.sendRequest

---

{{AddonSidebar}}{{Deprecated_Header}}

Warning: This method has been deprecated. Use {{WebExtAPIRef("runtime.sendMessage")}} instead.

Sends a single request to other listeners within the extension. Similar to {{WebExtAPIRef('runtime.connect')}}, but only sends a single request with an optional response. The {{WebExtAPIRef('extension.onRequest')}} event is fired in each page of the extension.

Syntax

chrome.extension.sendRequest(
  extensionId,             // optional string
  request,                 // any
  (response) => {/* … */}  // optional function
)

This API is also available as browser.extension.sendRequest() in a version that returns a promise.

Parameters

• extensionId {{optional_inline}}

  • : string. The extension ID of the extension you want to connect to. If omitted, default is your own extension.

• request

  • : any.

• responseCallback {{optional_inline}}

  • : function. The function is passed the following arguments:

    • response

      • : any. The JSON response object sent by the handler of the request. If an error occurs while connecting to the extension, the callback will be called with no arguments and {{WebExtAPIRef('runtime.lastError')}} will be set to the error message.

Browser compatibility

{{Compat}}

{{WebExtExamples}}

Note: This API is based on Chromium's chrome.extension API. This documentation is derived from extension.json in the Chromium code.