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ElementInternals: shadowRoot property

The shadowRoot read-only property of the ElementInternals interface returns the ShadowRoot for this element.

Value

A ShadowRoot if the element has a shadow root, otherwise null.

Examples

The following example prints the value of shadowRoot to the console, immediately after calling HTMLElement.attachInternals(). At this point the value is null. After calling Element.attachShadow() the element has a Shadow Root, and shadowRoot returns the object representing it.

js

class MyCustomElement extends HTMLElement {
  constructor() {
    super();
    this.internals_ = this.attachInternals();

    console.log(this.internals_.shadowRoot); // null

    this.attachShadow({ mode: "open" });

    console.log(this.internals_.shadowRoot); // a ShadowRoot object
  }
}

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
shadowRoot 88 88 93 No 74 16.4 88 88 93 63 16.4 15.0

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https://developer.mozilla.org/en-US/docs/Web/API/ElementInternals/shadowRoot