USB - Web APIs

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

Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The USB interface of the WebUSB API provides attributes and methods for finding and connecting USB devices from a web page.

Properties

None.

Event handlers

USB.onconnect: An event handler called whenever a previously paired device is connected.
USB.ondisconnect: An event handler called whenever a paired device is disconnected.

Methods

USB.getDevices(): Returns a Promise that resolves with an array of USBDevice objects for paired attached devices.
USB.requestDevice(): Returns a Promise that resolves with an instance of USBDevice if the specified device is found. Calling this function triggers the user agent's pairing flow.

Specifications

Specification	Status	Comment
WebUSB The definition of 'USB' in that specification.	Draft	Initial definition.

Browser compatibility

	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
`USB` Experimental	Chrome Full support 61	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 48	Safari No support No	WebView Android No support No	Chrome Android Full support 61	Firefox Android No support No	Opera Android Full support 45	Safari iOS No support No	Samsung Internet Android Full support 8.0
`getDevices` Experimental	Chrome Full support 61	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 48	Safari No support No	WebView Android No support No	Chrome Android Full support 61	Firefox Android No support No	Opera Android Full support 45	Safari iOS No support No	Samsung Internet Android Full support 8.0
`onconnect` Experimental	Chrome Full support 61	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 48	Safari No support No	WebView Android No support No	Chrome Android Full support 61	Firefox Android No support No	Opera Android Full support 45	Safari iOS No support No	Samsung Internet Android Full support 8.0
`ondisconnect` Experimental	Chrome Full support 61	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 48	Safari No support No	WebView Android No support No	Chrome Android Full support 61	Firefox Android No support No	Opera Android Full support 45	Safari iOS No support No	Samsung Internet Android Full support 8.0
`requestDevice` Experimental	Chrome Full support 61	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 48	Safari No support No	WebView Android No support No	Chrome Android Full support 61	Firefox Android No support No	Opera Android Full support 45	Safari iOS No support No	Samsung Internet Android Full support 8.0

Legend

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.: Experimental. Expect behavior to change in the future.