Window.customElements
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2020年1月.
customElements 是 Window 对象上的一个只读属性，接口返回一个 CustomElementRegistry 对象的引用，可用于注册新的 custom element，或者获取之前定义过的自定义元素的信息。
例子
这个属性最常用的例子是用来获取使用CustomElementRegistry.define()方法定义和注册的自定义元素，例如：
js
let customElementRegistry = window.customElements; customElementRegistry.define("my-custom-element", MyCustomElement); However, it is usually shortened to something like the following:
js
customElements.define( "element-details", class extends HTMLElement { constructor() { super(); const template = document.getElementById( "element-details-template", ).content; const shadowRoot = this.attachShadow({ mode: "open" }).appendChild( template.cloneNode(true), ); } }, ); 参阅我们的 web-components-examples 获取更多有用的例子。
规范
| Specification |
|---|
| HTML # dom-window-customelements |