ShadowRoot.mode

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句法
范例
规范
浏览器兼容性
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mode 特性为 ShadowRoot specifies its mode — either open or closed . This defines whether or not the shadow root's internal features are accessible from JavaScript.

当 mode of a shadow root is " closed ", the shadow root’s implementation internals are inaccessible and unchangeable from JavaScript—in the same way the implementation internals of, for example, the <video> element are inaccessible and unchangeable from JavaScript.

句法

var mode = shadowRoot.mode

值

A value defined in the ShadowRootMode enum — either open or closed .

范例

let customElem = document.querySelector('my-shadow-dom-element');
let shadow = customElem.shadowRoot;
// Another way to check whether the shadow root is open; it will return null if not
if(shadow) {
  // If it is open, close it to stop people stealing our secrets!
  shadow.mode = 'closed';
}

规范

规范	状态	注释
DOM The definition of 'ShadowRoot.mode' in that specification.	实时标准

浏览器兼容性

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`mode`	Chrome 57	Edge 79	Firefox 63 63 不支持 59 — 63 Disabled Disabled ). To change preferences in Firefox, visit	IE No	Opera 40	Safari 10.1	WebView Android 57	Chrome Android 57	Firefox Android 63 63 不支持 59 — 63 Disabled Disabled ). To change preferences in Firefox, visit	Opera Android 41	Safari iOS 10.3	Samsung Internet Android 6.0

图例

完整支持
不支持
实验。期望将来行为有所改变。
用户必须明确启用此特征。

元数据

最后修改： 2019 年 3 月 23 日

ShadowRoot
特性
1. delegatesFocus
2. host
3. innerHTML
4. mode
继承：

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句法

值

范例

规范

浏览器兼容性

图例

相关话题