CustomElementRegistry.get() - Web API 接口参考 编辑

 CustomElementRegistry 的get()方法返回以前定义自定义元素的构造函数.

语法

constructor = customElements.get(name);

参数

name

你想要返回引用的构造函数的自定义元素的名字。

返回值

指定名字的自定义元素的构造函数，如果没有使用该名称的自定义元素定义，则为undefined。

例子

customElements.define('my-paragraph',
  class extends HTMLElement {
    constructor() {
      super();
      let template = document.getElementById('my-paragraph');
      let templateContent = template.content;

      const shadowRoot = this.attachShadow({mode: 'open'})
        .appendChild(templateContent.cloneNode(true));
  }
})

// Return a reference to the my-paragraph constructor
let ctor = customElements.get('my-paragraph');

规范

Specification	Status	Comment
HTML Living Standard customElements.get()	Living Standard	Initial definition.

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