The Gamepad.index property of the Gamepad interface returns an integer that is auto-incremented to be unique for each device currently connected to the system.
This can be used to distinguish multiple controllers; a gamepad that is disconnected and reconnected will retain the same index.
Syntax
readonly attribute long index;
Example
window.addEventListener("gamepadconnected", function() {
var gp = navigator.getGamepads()[0];
gamepadInfo.innerHTML = "Gamepad connected at index " + gp.index + ": " + gp.id + ".";
});
Value
A number.
Specifications
| Specification | Status | Comment |
|---|---|---|
| Gamepad The definition of 'Gamepad.index' in that specification. |
Working Draft | Initial definition |
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
index | Chrome
Full support
35
| Edge Full support 12 | Firefox
Full support
29
| IE No support No | Opera
Full support
22
| Safari Full support 10.1 | WebView Android No support No | Chrome Android
Full support
35
| Firefox Android Full support 32 | Opera Android
Full support
22
| Safari iOS Full support 10.3 | Samsung Internet Android
Full support
4.0
|
Legend
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- User must explicitly enable this feature.
- User must explicitly enable this feature.
- Requires a vendor prefix or different name for use.
- Requires a vendor prefix or different name for use.
