Chrome中的“未捕获的TypeError：非法调用”

Question

当我用requestAnimationFrame以下代码做一些原生支持的动画时：var support = {    animationFrame: window.requestAnimationFrame ||        window.mozRequestAnimationFrame ||        window.webkitRequestAnimationFrame ||        window.msRequestAnimationFrame ||        window.oRequestAnimationFrame};support.animationFrame(function() {}); //errorsupport.animationFrame.call(window, function() {}); //right直接打电话给support.animationFrame意志......未捕获的TypeError：非法调用在Chrome中。为什么？

Answer 1

您还可以使用：

var obj = {

    alert: alert.bind(window)

};

obj.alert('I´m an alert!!');