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
InvalidStateErrorDOMException-
Thrown if the connection is already open.
NotAllowedErrorDOMException-
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
BCD tables only load in the browser