HTMLScriptElement: async property
The async
property of the HTMLScriptElement
interface is a boolean value that controls how the script should be executed. For classic scripts, if the async
property is set to true
, the external script will be fetched in parallel to parsing and evaluated as soon as it is available. For module scripts, if the async
property is set to true
, the script and all their dependencies will be fetched in parallel to parsing and evaluated as soon as they are available.
It reflects the async
attribute of the <script>
element.
Value
A boolean.
Examples
html
<script id="el" src="/example.js" async></script>
js
const el = document.getElementById("el");
console.log(el.async); // Output: true
Specifications
Specification |
---|
HTML Standard # dom-script-async |
Browser compatibility
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