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HIDDevice: open() method

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

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

The open() method of the HIDDevice interface requests that the operating system opens the HID device.

Note: HID devices are not opened automatically. Therefore, a HIDDevice returned by HID.requestDevice() must be opened with this method before it is available to transfer data.

Syntax

js

open()

Parameters

None.

Return value

A Promise that resolves with undefined once the connection is opened.

Exceptions

InvalidStateError DOMException

Thrown if the connection is already open.

NotAllowedError DOMException

Thrown if the attempt to open the connection fails for any reason.

Examples

In the following example, we wait for the HID connection to open before attempting to send or receive data.

js

await device.open();

Specifications

Specification
WebHID API
# dom-hiddevice-open

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
open 89 89 No No 75 No No No No No No No

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https://developer.mozilla.org/en-US/docs/Web/API/HIDDevice/open