然而，我不明白如何像上面的例子那样在Body矩形内传递一个HTML元素。
这并不完全是本例所做的。当无头运行时，Matter.js处理物理，而不知道它是如何呈现的。对于每个动画帧，您可以使用MJS身体的当前位置并重新定位您的元素(或在画布上绘制等)以反映MJS的世界观。
向MJS提供根元素似乎确实打破了单向数据流，但这只是为了通知MJS有关鼠标位置和点击之类的事件--不要与呈现混淆。
这里有一个最小的例子，希望能更清楚地说明这一点：

const engine = Matter.Engine.create();  
const box = {
  body: Matter.Bodies.rectangle(150, 0, 40, 40),
  elem: document.querySelector("#box"),
  render() {
    const {x, y} = this.body.position;
    this.elem.style.top = `${y - 20}px`;
    this.elem.style.left = `${x - 20}px`;
    this.elem.style.transform = `rotate(${this.body.angle}rad)`;
  },
};
const ground = Matter.Bodies.rectangle(
  200, 200, 400, 120, {isStatic: true}
);
const mouseConstraint = Matter.MouseConstraint.create(
  engine, {element: document.body}
);
Matter.Composite.add(
  engine.world, [box.body, ground, mouseConstraint]
);
(function rerender() {
  box.render();
  Matter.Engine.update(engine);
  requestAnimationFrame(rerender);
})();

# box {

  position: absolute;
  background: #111;
  height: 40px;
  width: 40px;
  cursor: move;
}

# ground {

  position: absolute;
  background: #666;
  top: 140px;
  height: 120px;
  width: 400px;
}

html, body {
  position: relative;
  height: 100%;
  margin: 0;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/matter-js/0.18.0/matter.min.js"></script>
<div id="box"></div>
<div id="ground"></div>

React

Reaction改变了工作流，但基本概念是相同的--MJS主体数据单向地从MJS后端流向呈现前端，因此从MJS的Angular 来看，一切都与上面的普通示例完全相同。大部分工作是正确设置refs和useEffect，以便与requestAnimationFrame一起使用。

const {Fragment, useEffect, useRef} = React;

const Scene = () => {
  const requestRef = useRef();
  const boxRef = useRef();
  const groundRef = useRef();

  const animate = () => {
    const engine = Matter.Engine.create();

    const box = {
      body: Matter.Bodies.rectangle(150, 0, 40, 40),
      elem: boxRef.current,
      render() {
        const {x, y} = this.body.position;
        this.elem.style.top = `${y - 20}px`;
        this.elem.style.left = `${x - 20}px`;
        this.elem.style.transform = `rotate(${this.body.angle}rad)`;
      },
    };
    const ground = Matter.Bodies.rectangle(
      200, // x
      200, // y
      400, // w
      120, // h
      {isStatic: true}
    );
    const mouseConstraint = Matter.MouseConstraint.create(
      engine,
      {element: document.body}
    );
    Matter.Composite.add(engine.world, [
      box.body,
      ground,
      mouseConstraint,
    ]);

    (function rerender() {
      box.render();
      Matter.Engine.update(engine);
      requestRef.current = requestAnimationFrame(rerender);
    })();
  };

  useEffect(() => {
    animate();
    return () => cancelAnimationFrame(requestRef.current);
  }, []);

  return (
    <Fragment>
      <div id="box" ref={boxRef}></div>
      <div id="ground" ref={groundRef}></div>
    </Fragment>
  );
};

ReactDOM.createRoot(document.querySelector("#app")).render(
  <Scene />
);

# box {

  position: absolute;
  background: #111;
  height: 40px;
  width: 40px;
  cursor: move;
}

# ground {

  position: absolute;
  top: 140px;
  height: 120px;
  width: 400px;
  background: #666;
}

html, body {
  position: relative;
  height: 100%;
  margin: 0;
}

<script crossorigin src="https://unpkg.com/react@18/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/matter-js/0.18.0/matter.min.js"></script>
<div id="app"></div>

请注意，这些只是概念验证。在它们能够支持更复杂的用例之前，可能需要更多的工作来建立抽象。