无法让 matter.js 开始

Question

我正在接近 matter.js 图书馆，但我什至无法启动它。我完全遵循了 "getting started" 指南，我看不到渲染器出现。你能看出我做错了什么吗？

谢谢！

// module aliases
var Engine = Matter.Engine,
    Render = Matter.Render,
    World = Matter.World,
    Bodies = Matter.Bodies;

// create an engine
var engine = Engine.create();

// create a renderer
var render = Render.create({
    element: document.body,
    engine: engine
});

// create two boxes and a ground
var boxA = Bodies.rectangle(400, 200, 80, 80);
var boxB = Bodies.rectangle(450, 50, 80, 80);
var ground = Bodies.rectangle(400, 610, 810, 60, { isStatic: true });

// add all of the bodies to the world
World.add(engine.world, [boxA, boxB, ground]);

// run the engine
Engine.run(engine);

// run the renderer
Render.run(render);

<!DOCTYPE html>
<html lang="en" dir="ltr">
  <head>
    <meta charset="utf-8">
    <title>frist sketch matter js</title>
    <link rel="stylesheet" type="text/css" href="style.css">
    <script language="javascript" type="text/javascript" src="sketch.js"></script>
    <script language="javascript" type="text/javascript" src="libraries/matter.js"></script>
    <style> body {padding: 0; margin: 0;} </style>
  </head>
  <body>
    <h1>First sketch</h1>
  </body>
</html>

Answer 1

我不知道 style.css 指的是什么，但是对 Javascript 文件使用 cdn 引用可以解决问题。

// module aliases
var Engine = Matter.Engine,
    Render = Matter.Render,
    World = Matter.World,
    Bodies = Matter.Bodies;

// create an engine
var engine = Engine.create();

// create a renderer
var render = Render.create({
    element: document.body,
    engine: engine
});

// create two boxes and a ground
var boxA = Bodies.rectangle(400, 200, 80, 80);
var boxB = Bodies.rectangle(450, 50, 80, 80);
var ground = Bodies.rectangle(400, 610, 810, 60, { isStatic: true });

// add all of the bodies to the world
World.add(engine.world, [boxA, boxB, ground]);

// run the engine
Engine.run(engine);

// run the renderer
Render.run(render);

<!DOCTYPE html>
<html lang="en" dir="ltr">
  <head>
    <meta charset="utf-8">
    <title>frist sketch matter js</title>
    <link rel="stylesheet" type="text/css" href="style.css">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/sketch.js/1.0/sketch.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/matter-js/0.14.2/matter.js"></script>
    <style>
    body {
      padding: 0;
      margin: 0;
    }
    </style>
  </head>
  <body>
    <h1>First sketch</h1>
  </body>
</html>

Answer 2

我发现问题可能是由于页面加载前javascript代码是运行引起的。所以我找到的方法是将这段代码添加到我的js文件中：window.addEventListener("load",init); 然后把我写的所有代码都放到这个函数中：function init(){...}

它似乎是这样工作的，但我想知道是否还有其他更好的方法来做到这一点

无法让 matter.js 开始

can't make matter.js start

javascript

html

css

matter.js