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
An integer.
Specifications
| Specification | Status | Comment |
|---|---|---|
| Gamepad The definition of 'Gamepad.index' in that specification. |
Working Draft | Initial definition |
Browser compatibility
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| General support | 21.0 webkit 35.0 |
(Yes) | 29.0 (29.0) | No support | 15.0 webkit 22.0 |
No support |
| Feature | Android | Edge | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| General support | No support | (Yes) | 32.0 (32.0) | No support | No support | No support |