CustomElementRegistry.upgrade()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

CustomElementRegistry 接口的 upgrade() 方法将更新节点子树中所有包含阴影的自定义元素,甚至在它们连接到主文档之前也是如此。

语法

customElements.upgrade(root);

参数

root

待升级的包含阴影的派生元素节点 。如果没有可升级的派生实例,则不会抛出异常。

返回值

空。

示例

摘至HTML 规范:

js
const el = document.createElement("spider-man");

class SpiderMan extends HTMLElement {}
customElements.define("spider-man", SpiderMan);

console.assert(!(el instanceof SpiderMan)); // not yet upgraded

customElements.upgrade(el);
console.assert(el instanceof SpiderMan); // upgraded!

规范

Specification
HTML
# dom-customelementregistry-upgrade-dev

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
upgrade

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support