Using all gamepad button infomation

gamepad-example.js

'use strict';

window.addEventListener("gamepadconnected", function(e) {
  var gp = e.gamepad;
  console.log("gamepad" + gp.index + " is connected!");
}, false);

window.addEventListener("gamepaddisconnected", function(e) {
  var gp = e.gamepad;
  console.log("gamepad" + gp.index + " is disconnected!");
}, false);

function buttonPressed(b) {
  if (typeof(b) == "object") {
    return b.pressed;
  }
  return b == 1.0;
}

function gameLoop() {
  requestAnimationFrame(gameLoop);

  var gamepads = navigator.getGamepads ? navigator.getGamepads()
               : navigator.webkitGetGamepads ? navigator.webkitGetGamepads
               : [];
  if (!gamepads) return;
  if (gamepads.length < 1) return;

  for (var i = 0; i < gamepads.length; i++) {
    var gp = gamepads[i];

    var result = "" + gp.index;
    if (buttonPressed(gp.buttons[0])) {
      result += " [press 0]";
    } else if (buttonPressed(gp.buttons[2])) {
      result += " [press 2]";
    }
    if (buttonPressed(gp.buttons[1])) {
      result += " [press 1]";
    } else if (buttonPressed(gp.buttons[3])) {
      result += " [press 3]";
    }
    var x_axis = gp.axes[0].toFixed(4);
    var y_axis = gp.axes[1].toFixed(4);
    result += " (" + x_axis + ", " + y_axis + ")";
    console.log(result);
  }

}

gameLoop();

Ubuntu: apt-get install joystick