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}