mozbrowserloadstart 编辑

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 mozbrowserloadstart event is fired when the browser <iframe> starts to load a new page.

This can be used when the embedder wants to start spinning a loading indicator, or update the UI in some other way to indicate loading has started.

General info

Specification

Non standard

Interface

CustomEvent

Bubbles

Yes

Cancelable

Yes

Target

<iframe>

Default Action

None

Properties

Example

In this example the mozbrowserloadend and mozbrowserloadstart events are used to change the icon shown on the stop/reload button between stop (x) and reload (R), as appropriate.

var browser = document.querySelector("iframe");

browser.addEventListener('mozbrowserloadstart',function() {
  stopReload.textContent = 'x';
});

browser.addEventListener('mozbrowserloadend',function() {
  stopReload.textContent = 'R';
});

Related Events

• mozbrowserasyncscroll
• mozbrowserclose
• mozbrowsercontextmenu
• mozbrowsererror
• mozbrowsericonchange
• mozbrowserloadend
• mozbrowserlocationchange
• mozbrowseropenwindow
• mozbrowsersecuritychange
• mozbrowsershowmodalprompt
• mozbrowsertitlechange
• mozbrowserusernameandpasswordrequired

See also

• Using the Browser API