HIDDevice: opened property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

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.

Note: This feature is available in Web Workers, except for Shared Web Workers.

The opened read-only property of the HIDDevice interface returns true if the connection to the HIDDevice is open and ready to transfer data.

Value

A boolean value, true if the connection is open.

Examples

The following example retrieves devices with HID.getDevices() and logs the value of opened to the console.

js
document.addEventListener("DOMContentLoaded", async () => {
  let devices = await navigator.hid.getDevices();
  devices.forEach((device) => {
    console.log(`HID: ${device.opened}`);
  });
});

Specifications

Specification
WebHID API
# dom-hiddevice-opened

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
opened
Experimental

Legend

Tip: you can click/tap on a cell for more information.

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