vue生成随机数

随机生成五位数

mounted(){
//调用具体的方法，随机生成五位数，最大数字是9
 this.teamNo = this.done(5, 9);
 }

   done(len, max) {
      var arr = [];
      var result = "";
      var count = 0;
      while (count < len) {
        var n = Math.floor(Math.random() * max + 1);
        if (arr.join().indexOf(n) == -1) {
          arr.push(n);
          count++;
        }
      }
      for (let index = 0; index < arr.length; index++) {
        result = result + arr[index];
      }
      return result;
    },