window.cancelAnimationFrame() - Web APIs 编辑

The window.cancelAnimationFrame() method cancels an animation frame request previously scheduled through a call to window.requestAnimationFrame().

Syntax

window.cancelAnimationFrame(requestID);

Parameters

requestID

The ID value returned by the call to window.requestAnimationFrame() that requested the callback.

Examples

var requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame ||
                            window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;

var cancelAnimationFrame = window.cancelAnimationFrame || window.mozCancelAnimationFrame;

var start = window.mozAnimationStartTime;  // Only supported in FF. Other browsers can use something like Date.now().

var myReq;

function step(timestamp) {
  var progress = timestamp - start;
  d.style.left = Math.min(progress / 10, 200) + 'px';
  if (progress < 2000) {
    // it's important to update the requestId each time you're calling requestAnimationFrame
    myReq = requestAnimationFrame(step);
  }
}
myReq = requestAnimationFrame(step);
// the cancelation uses the last requestId
cancelAnimationFrame(myReq);

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• window.mozAnimationStartTime
• window.requestAnimationFrame()