javascript - RangeError 与 requestAnimationFrame

Question

我收到以下错误:

RangeError: Maximum call stack size exceeded.

在这一行:

requestAnimFrame(Game.loop());

在这段代码中:

var Game = {
  canvas: null,
  context: null,
  targetFps: 60,

  init: function() {
    canvas = document.getElementById('main-canvas');
    context = canvas.getContext('2d');

    // Resize canvas to match content
    var content = document.getElementById('primary-content');
    canvas.width = content.offsetWidth;
    canvas.height = content.offsetHeight;

    window.requestAnimFrame = (function() {
      return window.requestAnimationFrame || // Chromium
        window.webkitRequestAnimationFrame || // WebKit
        window.mozRequestAnimationFrame || // Mozilla
        window.oRequestAnimationFrame || // Opera
        window.msRequestAnimationFrame || // IE
        null;
    })();

    this.loop();
  },

  loop: function() {
    requestAnimFrame(Game.loop());
  },

  update: function() {
    // ...
  },

  draw: function() {
    // Clear background with black
    context.fillStyle = '#000';
    context.fillRect(0, 0, canvas.width, canvas.height);
  }
};

Game.init();

<div id="primary-content">
  <canvas id="main-canvas" width="400" height="400"></canvas>
</div>

这可能是我忽略的明显问题，但我们将不胜感激。谢谢!

Answer 1

您正在立即调用该函数而不是传递它:

loop: function() {
        requestAnimFrame(Game.loop());
    }

只会一遍又一遍地执行 Game.loop()。

你想要的是:

loop: function() {
        requestAnimFrame(Game.loop);
    }

这会将函数作为参数传递给 requestAnimFrame，而不是调用 Game.loop() 并传递结果 (undefined) .