code: function getAxesPosition(axes, buttons) {
    if (axes.length === 10) {
      return Math.round(axes[9] / (2 / 7) + 3.5);
    }
    const [right, left, down, up] = [...buttons].reverse();
    const buttonValues = [up, right, down, left]
      .map((pressed, i) => (pressed.value ? i * 2 : false))
      .filter(val => val !== false);
    if (buttonValues.length === 0) return 8;
    if (buttonValues.length === 2 && buttonValues[0] === 0 && buttonValues[1] === 6) return 7;
    return buttonValues.reduce((prev, curr) => prev + curr, 0) / buttonValues.length;
  }
docs: Get the axes position based based on browser.
  @param {array} axes
  @param {array} buttons