This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2020.
The part global attribute contains a space-separated list of the part names of the element. Part names allows CSS to select and style specific elements in a shadow tree via the ::part pseudo-element.
See the exportparts attribute for a usage example.
| Specification |
|---|
| CSS Shadow Parts> # part-attr> |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
part |
73 | 79 | 72 | 60 | 13.1 | 73 | 79 | 52 | 13.4 | 11.0 | 73 | 13.4 |
exportparts HTML attribute<template> and <slot> HTML elements::part and ::slotted CSS pseudo-elementsShadowRoot interfaceElement.part property
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https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes/part