Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The mozbrowserusernameandpasswordrequired event is fired when the content within a browser <iframe> requires an HTTP authentification.

The embedder is supposed to retrieve the necessary credentials, usually using a dialog or a database of username/passwords, and then call authenticate() or cancel() as appropriate.

General info

Specification
Non standard
Interface
CustomEvent
Bubbles
Yes
Cancelable
Yes
Target
<iframe>
Default Action
None

Properties

Property Type Description
target Read only EventTarget The browser iframe
type Read only DOMString The type of event.
bubbles Read only Boolean Whether the event normally bubbles or not.
cancelable Read only Boolean Whether the event is cancellable or not.
details Read only Object A custom object.

details

The details property returns an anonymous JavaScript object with the following members:

host
A DOMString representing the host requesting the HTTP authentification.
realm
A DOMString representing the value of the realm HTTP header.
isProxy
A Boolean indicating whether the server dealing with the authentication is a proxy server (true) or not (false).
authenticate()
A function that is called to enable the authentication to go ahead. It needs to take two parameters — the username and password to authenticate.
cancel()
A function that is called to cancel the authentication.

Example

var browser = document.querySelector("iframe[mozbrowser]");

browser.addEventListener("mozbrowserusernameandpasswordrequired", function( event ) {
  console.log("The auth realm is:" + event.detail.realm);
});

See also