events.Event

An object which allows the addition and removal of listeners for a browser event.

Type

Values of this type are objects.

Methods

• {{WebExtAPIRef("events.Event.addListener","events.Event.addListener()")}}
  • : Registers an event listener to an event.
• {{WebExtAPIRef("events.Event.removeListener","events.Event.removeListener()")}}
  • : Deregisters an event listener from an event.
• {{WebExtAPIRef("events.Event.hasListener","events.Event.hasListener()")}}
  • : Tests registration status of a listener.
• {{WebExtAPIRef("events.Event.hasListeners","events.Event.hasListeners()")}}
  • : Tests whether any listeners are registered to the event.
• {{WebExtAPIRef("events.Event.addRules","events.Event.addRules()")}}
  • : Registers rules to handle events.
• {{WebExtAPIRef("events.Event.getRules","events.Event.getRules()")}}
  • : Returns currently registered rules.
• {{WebExtAPIRef("events.Event.removeRules","events.Event.removeRules()")}}
  • : Unregisters currently registered rules.

{{WebExtExamples}}

Browser compatibility

{{Compat}}

[!NOTE] This API is based on Chromium's chrome.events API. This documentation is derived from events.json in the Chromium code.

<!-- // Copyright 2015 The Chromium Authors. All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following disclaimer // in the documentation and/or other materials provided with the // distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived from // this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -->