ContextQMD
Back to Content

downloads.onErased

files/en-us/mozilla/add-ons/webextensions/api/downloads/onerased/index.md

latest3.1 KB
Original Source

The onErased() event of the {{WebExtAPIRef("downloads")}} API fires when a download is erased from the browser history.

The listener is passed the downloadId of the {{WebExtAPIRef('downloads.DownloadItem')}} object in question as a parameter.

Syntax

js-nolint
browser.downloads.onErased.addListener(listener)
browser.downloads.onErased.removeListener(listener)
browser.downloads.onErased.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 a given listener is registered for this event. Returns true if it is listening, false otherwise.

addListener syntax

Parameters

  • listener
    • : The function called when this event occurs. This function is passed this argument:
      • downloadId
        • : An integer representing the id of the {{WebExtAPIRef('downloads.DownloadItem')}} that was erased.

Examples

Add a listener for onErased events, then erase the most recent download:

js
function handleErased(item) {
  console.log(`Erased: ${item}`);
}

browser.downloads.onErased.addListener(handleErased);

let erasing = browser.downloads.erase({
  limit: 1,
  orderBy: ["-startTime"],
});

{{WebExtExamples}}

Browser compatibility

{{Compat}}

[!NOTE] This API is based on Chromium's chrome.downloads API.

<!-- // 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. -->