This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The getRootNode()
property of the Node
interface returns the context object's root, which optionally includes the shadow root if it is available.
var root = node.getRootNode(options)
composed
: A Boolean
that indicates whether the shadow root should be returned (false
, the default), or a root node beyond shadow root (true).A Node
interface.
The first simple example will return a reference to the HTML/document node when run in supporting browsers:
rootNode = node.rootNode;
This more complex example shows the difference between returning a normal root, and a root incuding the shadow root:
<!-- source: https://github.com/jserz/js_piece/blob/master/DOM/Node/getRootNode()/demo/getRootNode.html --> <div class="js-parent"> <div class="js-child"></div> </div> <div class="js-shadowHost"></div> <script> // work on Chrome 54+,Opera41+ var parent = document.querySelector('.js-parent'), child = document.querySelector('.js-child'), shadowHost = document.querySelector('.js-shadowHost'); console.log(parent.getRootNode().nodeName); // #document console.log(child.getRootNode().nodeName); // #document // create a ShadowRoot var shadowRoot = shadowHost.attachShadow({mode:'open'}); shadowRoot.innerHTML = '<style>div{background:#2bb8aa;}</style>' + '<div class="js-shadowChild">content</div>'; var shadowChild = shadowRoot.querySelector('.js-shadowChild'); // The default value of composed is false console.log(shadowChild.getRootNode() === shadowRoot); // true console.log(shadowChild.getRootNode({composed:false}) === shadowRoot); // true console.log(shadowChild.getRootNode({composed:true}).nodeName); // #document </script>
Specification | Status | Comment |
---|---|---|
DOM The definition of 'getRootNode()' in that specification. | Living Standard | Initial definition. |
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 54.0 | 53 (53) | ? | 41 | 10.1 |
Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|
Basic support | No support | 54.0 | 53.0 (53) | ? | 41 | 10.1 | 54.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/Node/getRootNode