downloads.onChanged

When any of a downloads.DownloadItem's properties except bytesReceived changes, this event fires with the downloadId and an object containing the properties that changed.

Syntax

browser.downloads.onChanged.addListener(function(
  downloadDelta // object
) {...})
browser.downloads.onChanged.removeListener(listener)
browser.downloads.onChanged.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:

downloadDelta

object.

Additional objects

downloadDelta

id

integer. The id of the downloads.DownloadItem that changed.

urlOptional

downloads.StringDelta. Describes a change in a downloads.DownloadItem's url.

filenameOptional

downloads.StringDelta. Describes a change in a downloads.DownloadItem's filename.

dangerOptional

downloads.StringDelta. Describes a change in a downloads.DownloadItem's danger.

mimeOptional

downloads.StringDelta. Describes a change in a downloads.DownloadItem's mime.

startTimeOptional

downloads.StringDelta. Describes a change in a downloads.DownloadItem's startTime.

endTimeOptional

downloads.StringDelta. Describes a change in a downloads.DownloadItem's endTime.

stateOptional

downloads.StringDelta. Describes a change in a downloads.DownloadItem's state.

canResumeOptional

downloads.BooleanDelta.

pausedOptional

downloads.BooleanDelta. Describes a change in a downloads.DownloadItem's paused.

errorOptional

downloads.StringDelta. Describes a change in a downloads.DownloadItem's error.

totalBytesOptional

downloads.DoubleDelta. Describes a change in a downloads.DownloadItem's totalBytes.

fileSizeOptional

downloads.DoubleDelta. Describes a change in a downloads.DownloadItem's fileSize.

existsOptional

downloads.BooleanDelta.

Browser compatibility

Examples

// 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.