HIDDevice: sendFeatureReport() 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.

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

The sendFeatureReport() method of the HIDDevice interface sends a feature report to the HID device. Feature reports are a way for HID devices and applications to exchange non-standardized HID data.

The reportId for each of the report formats that this device supports can be retrieved from HIDDevice.collections.

Syntax

js
sendFeatureReport(reportId, data)

Parameters

reportId

An 8-bit report ID. If the HID device does not use report IDs, send 0.

data

Bytes as an ArrayBuffer, a TypedArray, or a DataView.

Return value

A Promise that resolves with undefined once the report has been sent.

Exceptions

NotAllowedError DOMException

Thrown if sending the report fails for any reason.

Examples

In the following example sendFeatureReport() makes a device blink. You can see more examples and live demos in the article Connecting to uncommon HID devices.

js
const reportId = 1;
for (let i = 0; i < 10; i++) {
  // Turn off
  await device.sendFeatureReport(reportId, Uint32Array.from([0, 0]));
  await new Promise((resolve) => setTimeout(resolve, 100));
  // Turn on
  await device.sendFeatureReport(reportId, Uint32Array.from([512, 0]));
  await new Promise((resolve) => setTimeout(resolve, 100));
}

Specifications