随机id

 自动生成id

第一种

/**
 * 获取UUID
 * @returns {string}
 */
export function getUUID() {
  let len = 32 // 32长度
  let radix = 16 // 16进制
  let chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('')
  let uuid = []
  let i
  radix = radix || chars.length
  if (len) {
    for (i = 0; i < len; i++) {
      uuid[i] = chars[0 | Math.random() * radix]
    }
  } else {
    var r
    uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-'
    uuid[14] = '4'
    for (i = 0; i < 36; i++) {
      if (!uuid[i]) {
        r = 0 | Math.random() * 16
        uuid[i] = chars[(i === 19) ? (r & 0x3) | 0x8 : r]
      }
    }
  }
  return uuid.join('').toLowerCase()
}

 第二种

function generateID(len, seed = '') {
  var idLen = len ? (len < 12 ? 12 : len) : 12
  var idSeed = seed
  var randomSeed = 'ABCDEFGHIGKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz'
  var randomStr = ''
  while (randomStr.length < idLen) {
    randomStr += randomSeed.substr(Math.ceil(Math.random() * 62), 1)
  }
  return idSeed + randomStr
}