ReferenceError: requestAnimationFrame is not defined

在你的代码中出现了"ReferenceError: requestAnimationFrame is not defined"的错误。这个错误通常是由于浏览器不支持requestAnimationFrame函数引起的。为了解决这个问题，你可以在main.js文件中添加一个requestAnimationFrame的polyfill函数来模拟这个函数的行为。你可以使用下面的代码片段来添加这个polyfill函数：

(function() {
var lastTime = 0;
var vendors = ['ms', 'moz', 'webkit', 'o'];
for (var x = 0; x < vendors.length && !window.requestAnimationFrame; x++) {
window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame'];
}

if (!window.requestAnimationFrame) {
window.requestAnimationFrame = function(callback, element) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var id = window.setTimeout(function() {
callback(currTime + timeToCall);
}, timeToCall);
lastTime = currTime + timeToCall;
return id;
};
}

if (!window.cancelAnimationFrame) {
window.cancelAnimationFrame = function(id) {
clearTimeout(id);
};
}
})();

通过添加这个polyfill函数，你可以确保在不支持requestAnimationFrame函数的浏览器上也能正常运行你的代码。希望这能解决你的问题。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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