Web/API/WorkerGlobalScope/importScripts

The importScripts() method of the WorkerGlobalScope interface synchronously imports one or more scripts into the worker's scope.

Syntax

self.importScripts('foo.js');
self.importScripts('foo.js', 'bar.js', ...);

Parameters

A comma-separated list of DOMString objects representing the scripts to be imported. These paths are relative to html document base URL.

Return value

None.

Exceptions

NetworkError: Imported scripts were not served with a valid JavaScript MIME type (i.e. text/javascript).

Example

If you had some functionality written in a separate script called foo.js that you wanted to use inside worker.js, you could import it using the following line:

importScripts('foo.js');

importScripts() and self.importScripts() are effectively equivalent — both represent importScripts() being called from inside the worker's inner scope.

Specifications

Specification	Status	Comment
HTML Living StandardThe definition of 'importScripts()' in that specification.	Living Standard

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`importScripts`	Chrome Full support 4	Edge Full support 12	Firefox Full support 4	IE Full support 10	Opera Full support 10.6	Safari Full support 4	WebView Android Full support ≤37	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 11	Safari iOS Full support 3.2	Samsung Internet Android Full support 1.0
Strict MIME type checks for `importScripts()`	Chrome Full support 71	Edge Full support ≤79	Firefox Full support 67	IE ?	Opera Full support 58	Safari No support No	WebView Android Full support 71	Chrome Android Full support 71	Firefox Android Full support 67	Opera Android Full support 50	Safari iOS No support No	Samsung Internet Android Full support 10.0

Legend

Full support: Full support
No support: No support
Compatibility unknown: Compatibility unknown