This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The controlTransferIn() method of the USBDevice interface returns a promise that resolves with a USBInTransferResult when a command or status operation has been transmitted to the USB device.
Syntax
var promise = USBDevice.controlTransferIn(setup, length)
Parameters
- setup
- An object that sets options for . The available options are:
requestType: Must be one of three values specifying whether the tranfer is"standard"(common to all USB devices)"class"(common to an industry-standard class of devices) or"vendor".recipient: Specifices the target of the transfer on the device, one of"device","interface","endpoint", or"other".request: A vendor-specific command.value: Vender-specific request parameters.index: The interface number of the recipient.
- length
- A variable to contain the length of the data that will be read back from the device. The actual data is in the
USBInTransferResultin the resolved Promise.
Return value
promise that resolves with a USBInTransferResult.
Specifications
| Specification | Status | Comment |
|---|---|---|
| WebUSB The definition of 'controlTransferIn()' in that specification. |
Draft | Initial definition. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 61 | No | No | No | 48 | No |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | No | 61 | No | No | 48 | No | No |