JavaScript element.attachShadow() Method
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JavaScript element.attachShadow() Method
The element.attachShadow() method attaches a shadow DOM tree to the specified element and returns a reference to its ShadowRoot.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p id="point">Main Element</p>
<script>
var x = document.getElementById("point");
var node = document.createElement("h2");
var shadowRoot = node.attachShadow({mode: "open"});
shadowRoot.innerHTML = '<div id="myShadowChild">content</div>';
var shadowChild = shadowRoot.getElementById("myShadowChild");
console.log(node.shadowRoot);
</script>
</body>
</html>
Syntax
element.attachShadow(shadowRootInit)
Parameter Values
| Value | Type | Explanation |
|---|---|---|
| shadowRootInit | Required | {mode: "open"} - Elements of the shadow root are accessible from JavaScript outside the root. {mode: "closed"} - Denies access to the node(s) of a closed shadow root from JavaScript outside it. |
Return Values
| Value | Explanation |
|---|---|
| Object | Returns a ShadowRoot object (when mode is open). |
| null | Returns null (when mode is closed). |
element.attachShadow() with Options
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p id="point">Main Element</p>
<script>
var x = document.getElementById("point");
var node = document.createElement("h2");
var shadowRoot = node.attachShadow({mode: "closed"});
shadowRoot.innerHTML = '<div id="myShadowChild">content</div>';
var shadowChild = shadowRoot.getElementById("myShadowChild");
console.log(node.shadowRoot);
</script>
</body>
</html>
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