javascript - Can't use cancelAnimationFrame. Nothing happens (chrome) -

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problem: can't cancel requestanimationframe using chromes recognized cancelanimationframe.

what tried: used console.log no errors displayed. console.logged cancelanimationframe , undefined, while request counterpart logs fine. tried different version of cancelanimationframe, including prefixed versions:

cancelanimationframe webkitcancelanimationframe window.cancelanimationframe etc..

i tried putting canceling code function expected doesn't matter.

question: why can't stop requestanimationframe? canceling way recommended?

http://jsfiddle.net/p8hv15j4/2/

var elem = document.getelementbyid('test'); var currentpos = 0;  var requestanimationframe = window.requestanimationframe ||                              window.mozrequestanimationframe ||                              window.webkitrequestanimationframe ||                              window.msrequestanimationframe;  function fn() {     currentpos += 5;      elem.style.left = currentpos + "px";      if (math.abs(currentpos) >= 900) {         currentpos = -500;     }         requestanimationframe(fn); } fn();  settimeout(function() {      cancelanimationframe(fn);    }, 1000)

requestanimationframe returns id, need pass cancelanimationframe.

in fact, works same way set/cleartimeout - setting returns identifier, , cancel identifier.


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