The Web Performance API allows web pages access to certain functions for measuring the performance of web pages and web applications, including the Navigation Timing API and high-resolution time data.

API HTML DOM NeedsCompatTable NeedsContent NeedsExample NeedsMarkupWork NeedsSpecTable NeedsUpdate Property Reference Référence Window

Returns the personalbar object, whose visibility can be toggled in the window.

API HTML DOM NeedsCompatTable NeedsExample NeedsMarkupWork NeedsSpecTable Property Reference Référence Window

API HTML DOM NeedsCompatTable NeedsExample NeedsMarkupWork NeedsSpecTable Obsolete Property Reference Référence Window

Returns the scrollbars object, whose visibility can be checked.

API HTML DOM NeedsCompatTable NeedsExample NeedsMarkupWork NeedsSpecTable Property Reference Référence Window

Returns the maximum number of pixels that the document can be scrolled vertically.

API DOM_0 HTML DOM NeedsCompatTable NeedsExample NeedsMarkupWork NeedsSpecTable Non-standard Property Reference Référence Window

Sets the text in the status bar at the bottom of the browser or returns the previously set text.

API HTML DOM NeedsCompatTable NeedsExample NeedsMarkupWork NeedsSpecTable Property Reference Référence Window

Returns the statusbar object, whose visibility can be toggled in the window.

API HTML DOM NeedsCompatTable NeedsExample NeedsMarkupWork NeedsSpecTable Property Reference Référence Window

Returns the toolbar object, whose visibility can be toggled in the window.

API HTML DOM NeedsCompatTable NeedsExample NeedsMarkupWork NeedsSpecTable Property Reference Référence Window

The window property of a window object points to the window object itself. Thus the following expressions all return the same window object:

API HTML DOM NeedsCompatTable NeedsExample NeedsMarkupWork NeedsSpecTable Property Reference Référence Window

Repeatedly calls a function or executes a code snippet, with a fixed time delay between each call. Returns an intervalID.

API DOM Gecko Intervals JavaScript timers MakeBrowserAgnostic Method NeedsMarkupWork setInterval Timers WindowTimers

Sets a timer which executes a function or specified piece of code once after the timer expires.

API HTML DOM Intervals JavaScript timers MakeBrowserAgnostic Method NeedsCompatTable NeedsMarkupWork NeedsUpdate Reference setTimeout Timers WindowTimers

API File and Directory Entries API File API File System API Files FileSystemDirectoryEntry Interface NeedsMarkupWork Non-standard Non-Standard Offline offline Reference