前端生成6位或多位随机字符串

/**
 * 生成6位随机字符串
 * @returns 
 */
const randomCode = () => {
  let character = ''
  let len = 6; // 选择的生成的位数
  let code = '0123456789qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASFGHJKLZXCVBNM'
  let maxPos = code.length;
  for (let i = 0; i < len; i++) {
    character += code.charAt(Math.floor(Math.random() * maxPos))
  }
  return character
}