webNavigation.onErrorOccurred

Fired when an error occurs and the navigation is aborted. This can happen if either a network error occurred, or the user aborted the navigation.

Syntax

browser.webNavigation.onErrorOccurred.addListener(
  listener,                   // function
  filter                      // optional object
)
browser.webNavigation.onErrorOccurred.removeListener(listener)
browser.webNavigation.onErrorOccurred.hasListener(listener)

Events have three functions:

addListener(listener)

addListener(listener, filter)

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

listener

Function that will be called when this event occurs.

The listener function will be called with the following arguments:

details

object. Details about the navigation event. details has the following properties:

tabId

integer. The ID of the tab in which the navigation was happening.

url

string. The URL to which the given frame was navigating.

processId

integer. The ID of the process in which this tab is being rendered.

frameId

integer. Frame in which the navigation was happening.

0 indicates that navigation happened in the tab's top-level browsing context, not in a nested <iframe>.

A positive value indicates that navigation happened in a nested iframe.

Frame IDs are unique for a given tab and process.

timeStamp

number. The time at which the error occurred, in milliseconds since the epoch.

error

string. The error code. This is an internal error code, and is not guaranteed to stay the same or be consistent from one browser to another.

filterOptional

object. An object containing a single property url, which is an Array of events.UrlFilter objects.

If you include this parameter, then the event will fire only for transitions to URLs which match at least one UrlFilter in the array.

If you omit this parameter, the event will fire for all transitions.

Browser compatibility

Examples

Logs the target URLs for onErrorOccurred, if the target URL's hostname contains "example.com" or starts with "developer".

const filter = {
  url:
  [
    {hostContains: "example.com"},
    {hostPrefix: "developer"}
  ]
}

function logOnErrorOccurred(details) {
  console.log(`onErrorOccurred: ${details.url}`);
  console.log(details.error);
}

browser.webNavigation.onErrorOccurred.addListener(logOnErrorOccurred, filter);