Element.part | Web API

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句法
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规范
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part 特性为 元素 interface represents the part identifier(s) of the element (i.e. set using the part attribute), returned as a DOMTokenList . These can be used to style parts of a shadow DOM, via the ::part pseudo-element.

句法

let elementPartList = element.part

范例

The following excerpt is from our shadow-part example. Here the part attribute is used to find the shadow parts, and the part property is then used to change the part identifiers of each tab so the correct styling is applied to the active tab when tabs are clicked.

let tabs = [];
let children = this.shadowRoot.children;
for(let elem of children) {
  if(elem.getAttribute('part')) {
    tabs.push(elem);
  }
}
tabs.forEach((tab) => {
  tab.addEventListener('click', (e) => {
    tabs.forEach((tab) => {
      tab.part = 'tab';
    })
    e.target.part = 'tab active';
  })
  console.log(tab.part);
})

规范

规范	状态	注释
Shadow Parts The definition of 'Element.part' in that specification.	工作草案

浏览器兼容性

The compatibility table on 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
`part`	Chrome Yes	Edge 79	Firefox 71	IE No	Opera Yes	Safari 13.1	WebView Android Yes	Chrome Android Yes	Firefox Android No	Opera Android ?	Safari iOS 13.4	Samsung Internet Android Yes

图例

完整支持
不支持
兼容性未知 ?
用户必须明确启用此特征。

另请参阅

::part
part

元数据

最后修改： Nov 7, 2019

在此页

句法

范例

规范

浏览器兼容性

图例

另请参阅

相关话题