This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The addModule() method of the Worklet interface loads the module in the given JavaScript file and adds it to the current Worklet.


addPromise = worklet.addModule(moduleURL);
addPromise = worklet.addModule(moduleURL, options);


A String containing the URL of a JavaScript file with the module to add.
options Optional
An object with any of the following options:
  • credentials: A RequestCredentials value that indicates whether to send credentials (e.g. cookies and HTTP authentification) when loading the module. Can be one of "omit", "same-origin", or "include". Defaults to "same-origin". See also Request.credentials.

Return value

A Promise that resolves once the module from the given URL has been added. The promise doesn't return any value.


const audioCtx = new AudioContext();
const audioWorklet = audioCtx.audioWorklet;
await audioWorklet.addModule('modules/bypassFilter.js', {
  credentials: 'omit',


Specification Status Comment
Worklets Level 1
The definition of 'addModule()' in that specification.
Working Draft  

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support65 No63 No52 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support6565 No6352 No Yes

Document Tags and Contributors

Contributors to this page: chrisdavidmills, Sheppy, Jedipedia
Last updated by: chrisdavidmills,