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98 lines
2.0 KiB
98 lines
2.0 KiB
2 years ago
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<!DOCTYPE html>
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<html lang="zh">
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<head>
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<meta charset="utf-8" />
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<base href="../../../" />
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<script src="page.js"></script>
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<link type="text/css" rel="stylesheet" href="page.css" />
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</head>
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<body>
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<h1>[name]</h1>
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<p class="desc">
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自定义对象的 JavaScript 事件。<br />
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[link:https://github.com/mrdoob/eventdispatcher.js EventDispatcher on GitHub]
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</p>
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<h2>代码示例</h2>
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<code>
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// 为自定义对象添加事件
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class Car extends EventDispatcher {
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start() {
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this.dispatchEvent( { type: 'start', message: 'vroom vroom!' } );
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};
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}
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// 使用自定义对象的事件
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const car = new Car();
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car.addEventListener( 'start', function ( event ) {
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alert( event.message );
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} );
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car.start();
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</code>
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<h2>构造函数</h2>
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<h3>[name]()</h3>
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<p>
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创建 EventDispatcher 对象。
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</p>
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<h2>方法</h2>
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<h3>[method:undefined addEventListener]( [param:String type], [param:Function listener] )</h3>
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<p>
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type - 需要添加监听的事件类型。<br />
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listener - 事件发生时被调用到的函数。
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</p>
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<p>
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为指定事件增加监听函数。
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</p>
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<h3>[method:Boolean hasEventListener]( [param:String type], [param:Function listener] )</h3>
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<p>
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type - 需要被监听的事件类型。<br />
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listener - 事件发生时被调用到的函数。
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</p>
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<p>
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检查监听函数是否已经添加到指定事件。
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</p>
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<h3>[method:undefined removeEventListener]( [param:String type], [param:Function listener] )</h3>
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<p>
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type - 需要移除监听的事件类型。<br />
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listener - 需要被移除的监听函数。
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</p>
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<p>
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从指定事件类型中移除监听函数。
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</p>
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<h3>[method:undefined dispatchEvent]( [param:Object event] )</h3>
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<p>
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event - 将被触发的事件。
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</p>
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<p>
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触发一个事件。
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</p>
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<h2>源代码</h2>
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<p>
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[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
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</p>
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</body>
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</html>
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