elementui表单验证小于300的正整数

 alarm_time: [
          { required: true, message: "请输入时间", trigger: "blur" },
           {
            validator(rule, value, callback) {
            if (Number.isInteger(Number(value)) && Number(value) >= 0 && Number(value) <  300) {
              callback()            
              } else {
                callback(new Error(‘请输小于正整数‘))
              }
            },
            trigger: ‘blur‘
          }
        ],