This event handler is called when an offline is fired on body and bubbles up, when navigator.onLine property changes and becomes false.

API DOM NeedsContent Property Reference Référence

API Apps DOMApplicationsRegistry Firefox OS Method NeedsContent

This method is called whenever an event occurs of the type for which the EventListener interface was registered.

API DOM DOM Events NeedsContent NeedsMarkupWork

API Interface Junk junk NeedsContent SVG SVGAltGlyphDefElement

API EncryptedMediaExtensions MediaKeyMessageEvent NeedsContent NeedsExample Reference Référence

The MediaKeySystemConfiguration interface EncryptedMediaExtensions API provides configuration information about the media key system.

API EncryptedMediaExtensions MediaKeySystemConfiguration NeedsContent NeedsExample Reference Référence

A MutationRecord represents an individual DOM mutation. It is the object that is passed to MutationObserver's callback.

Advanced API DOM DOM Reference NeedsContent Reference

API Landing NeedsContent Overview Payment Request Reference

API Constructor NeedsContent Payment Request PaymentRequest Reference

The High Resolution Time standard defines a Performance interface that supports client-side latency measurements within applications. The Performance interfaces are considered high resolution because they are accurate to a thousandth of a millisecond (subject to hardware or software constraints). The interfaces support a number of use cases including calculating frame-rates (potentially important in animations) and benchmarking (such as the time to load a resource).

Guide NeedsContent Overview performance Performance Web Performance

A WebSocket server is a TCP application listening on any port of a server that follows a specific protocol, simple as that. The task of creating a custom server tends to scare people; however, it can be easy to implement a simple WebSocket server on your platform of choice.

Guide HTML5 NeedsContent NeedsExample Tutorial WebSocket WebSockets

Width (in pixels) of the browser window viewport including, if rendered, the vertical scrollbar.

API CSSOM View NeedsContent NeedsSpecTable Property Reference

Window.outerWidth gets the width of the outside of the browser window. It represents the width of the whole browser window including sidebar (if expanded), window chrome and window resizing borders/handles.

API CSSOM View NeedsContent Property Reference Référence

This method is currently not working, but you can use:

API DOM Method NeedsContent Reference Référence Window

The XMLHttpRequest.send() method sends the request. If the request is asynchronous (which is the default), this method returns as soon as the request is sent. If the request is synchronous, this method doesn't return until the response has arrived. send() accepts an optional argument for the request body. If the request method is GET or HEAD, the argument is ignored and request body is set to null.

AJAX API NeedsContent NeedsExample Reference XMLHttpRequest

XMLHttpRequestEventTarget is the interface that describes the event handlers you can implement in an object that will handle events for an XMLHttpRequest.

AJAX API NeedsBrowserCompatibility NeedsContent Reference XMLHttpRequest

In HTML5, some HTML elements which provide support for CORS, such as <img> or <video>, have a crossorigin attribute (crossOrigin property), which lets you configure the CORS requests for the element's fetched data. These attributes are enumerated, and have the following possible values:

Advanced CORS HTML NeedsContent NeedsExample Reference Security

The HTML <element> element is used to define new custom DOM elements.

Element HTML NeedsContent Reference Web Web Components

The ::-moz-page CSS pseudo-element applies to an individual page in print or print preview.

CSS CSS Reference NeedsCompatTable NeedsContent NeedsExample Non-standard

CSS CSS Reference NeedsBrowserCompatibility NeedsContent NeedsExample NeedsMobileBrowserCompatibility Non-standard