HTMLScriptElement: async property
BaselineWidely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Theasync property of theHTMLScriptElement interface is a boolean value that controls how the script should be executed. For classic scripts, if theasync property is set totrue, the external script will be fetched in parallel to parsing and evaluated as soon as it is available. Formodule scripts, if theasync property is set totrue, the script and all their dependencies will be fetched in parallel to parsing and evaluated as soon as they are available.
It reflects theasync attribute of the<script> element.
Value
A boolean.
Examples
html
<script src="/example.js" async></script>js
const el = document.getElementById("el");console.log(el.async); // Output: trueSpecifications
| Specification |
|---|
| HTML # dom-script-async |