Question

// 方法 1
function RandomColor() {
  return "#" + Math.floor(Math.random() * 0xffffff).toString(16).padEnd(6, "0");
}

// 方法 2
function hexColor() {
  let str = '#';
  let arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 'A', 'B', 'C', 'D', 'E', 'F'];
  for (let i = 0; i < 6; i++) {
    let index = Number.parseInt((Math.random() * 16).toString());
    str += arr[index]
  }
  return str;
}

// 方法 3
function randomHexColorCode() {
  let n = (Math.random() * 0xfffff * 1000000).toString(16);
  return '#' + n.slice(0, 6);
};