Window.onmozbeforepaint

Obsolete since Gecko 11 (Firefox 11 / Thunderbird 11 / SeaMonkey 2.8)
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

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.

Warning: This non-standard event handler has not worked for several releases, and has been removed in Gecko 11.0 (Firefox 11.0 / Thunderbird 11.0 / SeaMonkey 2.8).

Summary

An event handler for the MozBeforePaint event. This is used in concert with the window.mozRequestAnimationFrame() method to perform smooth, synchronized animations from JavaScript code.

Syntax

JavaScript
window.onmozbeforepaint = funcRef;
  • funcRef is the handler function.

Example

See window.mozRequestAnimationFrame() for an example.

Notes

This event fires immediately before the browser window is repainted, if the event has been requested by one or more scripts calling window.mozRequestAnimationFrame(). The event handler receives as an input parameter an event whose timeStamp property is the time, in milliseconds since epoch, that is the "current time" for the current animation frame. This time is the same for all animations being run in the same browser window, including those using the window.mozRequestAnimationFrame() method, CSS transitions, and SMIL animations.

Specification

Not part of a specification.

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/window/onmozbeforepaint

API Property