JSFiddle - React, Tailwind, and code Playground

JavaScript

setInterval(pollGamepadsTest, 16);

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

function gameLoop() {
  var gamepads = navigator.getGamepads ? navigator.getGamepads() : (navigator.webkitGetGamepads ? navigator.webkitGetGamepads : []);
  if (!gamepads) {
    return;
  }

  var gp = gamepads[0];
  if (gp.axes[0] != 0 || gp.axes[1] != 0 || gp.axes[2] != 0 || gp.axes[3] != 0) {
    console.log("GamePad Axes");
  }
}

function pollGamepadsTest() {
  var gamepads = navigator.getGamepads ? navigator.getGamepads() : (navigator.webkitGetGamepads ? navigator.webkitGetGamepads : []);
  for (var i = 0; i < gamepads.length; i++) {
    var gp = gamepads[i];
    if (gp) {
       gameLoop();
    }
  }
}