Build your own JavaScript tool library

There are two kinds of productivity, one is people and the other is tools. Whether the tool is used well or not determines whether we leave work early or not.

foreword

In the process of business development, we often repeatedly use tools and methods such as data type verification, date formatting, data encryption, random number generation, and throttling functions. These tool functions are properly packaged and organized for easy use. Improve development efficiency.

data type check

Maybe you like to encapsulate the method as the method of ES6 Class, but considering that it is more troublesome to instantiate when using it (of course, it can also be written as a static method), but I am still used to hanging the method on the property of the object, as follows:

const Validator = {};

/**
 * 判断是否是数字, 如：'123.1' 、123.1 都是true
 *
 * @static
 * @param {any} value
 * @returns
 */
Validator.isNumber = (value) => {
  const re = /^[0-9]+\.?[0-9]*$/;
  return re.test(value);
};

/**
 * 整形数字: 2=true; '2'=true
 *
 * @static
 * @param {any} value
 * @returns
 */
Validator.isIntNumber = (value) => {
  if (value === '0' || value === 0) {
    return true;
  }
  const re = /^[1-9]+[0-9]*]*$/;
  return re.test(value);
};

/**
 * 整形数 2 = true; '2' = false
 * 这个方法会严格区分string类型的数字
 * @static
 * @param {any} val
 * @returns
 */
Validator.isInt = (val) => {
  if (Validator.isIntNumber(val)) {
    return typeof val === 'number';
  }
  return false;
};

/**
 * 是不是浮点型, 如：'123.1' = false 、123.1 = true
 *
 * @static
 * @param {any} value
 * @returns
 */
Validator.isFloat = (value) => {
  const result = Validator.isNumber(value);
  return result && parseFloat === value;
};

/**
 * 时间戳判断
 *
 * @static
 * @param {any} value
 * @returns
 */
Validator.isTimestamp = (value) => {
  return typeof value === 'number';
};

/**
 * 验证手机号
 *
 * @static
 * @param {any} value
 * @returns
 */
Validator.isPhone = (value) => {
  const reg = /^0?(1[34578])[0-9]{9}$/;
  return reg.test(value);
};

/**
 * Url验证
 *
 * @static
 * @param {any} value
 * @returns
 */
Validator.isUrl = (value) => {
  const strRegex = /(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?/;
  return strRegex.test(value);
};

/**
 * 是否大写字母
 *
 * @static
 * @param {any} value
 * @returns
 */
Validator.isCapital = (value) => {
  const reg = /[A-Z]/;
  return reg.test(value);
};

/**
 * 是否为空
 *
 * @static
 * @param {any} value
 * @returns
 */
Validator.isEmpty = (value) => {
  // return value?true:false;
  return !!value;
};

/**
 * 是否是一个对象
 *
 * @static
 * @param {any} value 要判断的对象
 * @returns
 */
Validator.isObject = (value) => {
  const keys = Object.keys(value);
  const values = Object.values(value);
  console.log('is object typeof value is:', typeof value);
  return keys.length > 0 && values.length > 0 && typeof value === 'object';
};

/**
 * 是否为空
 *
 * @static
 * @param {any} value
 * @returns
 */
Validator.isNotEmpty = (value) => {
  return !this.isEmpty(value);
};

Validator.isMobilePhone = (value) => {
  const reg = /^(\+?0?86\-?)?1[345789]\d{9}$/;
  return reg.test(value);
};
/**
 * 是否是monogoDB里的objectId值
 *
 * @static
 * @param {any} value
 * @returns
 */
Validator.isMongoDBObjectId = (value) => {
  return objectId.isValid(value);
};

/**
 * 此方法特殊方法。obj只能传一个对象。
 *
 * @static
 * @param {any} obj 对象
 * @param {any} value 值
 */
Validator.isObjectValue = (obj, value) => {
  if (!Validator.isObject(obj)) {
    return false;
  }

  return Object.values(obj).includes(value);
};

/**
 * 检测邮箱
 * @param email
 * @returns {boolean}
 */
Validator.testEmail = (email) => {
  const reg = /^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
  return reg.test(email);
};

/**
 * 身份证号码验证
 *
 * @param cardNo {String} 证件号码
 * @returns info {Object} 身份证信息.
 *
 */
Validator.getIdCardInfo = (cardNo) => {
  const info = {
    isTrue: false, // 身份证号是否有效。默认为 false
    year: null, // 出生年。默认为null
    month: null, // 出生月。默认为null
    day: null, // 出生日。默认为null
    isMale: false, // 是否为男性。默认false
    isFemale: false, // 是否为女性。默认false
  };

  if (!cardNo && cardNo.length !== 15 && cardNo.length !== 18) {
    info.isTrue = false;
    return info;
  }

  if (cardNo.length === 15) {
    const year = cardNo.substring(6, 8);
    const month = cardNo.substring(8, 10);
    const day = cardNo.substring(10, 12);
    const p = cardNo.substring(14, 15); // 性别位
    const birthday = new Date(year,
      parseFloat(month) - 1,
      parseFloat(day), 12, 0, 0, 0);

    // 对于老身份证中的年龄则不需考虑千年虫问题而使用getYear()方法
    if (birthday.getYear() !== parseFloat(year) ||
      birthday.getMonth() !== parseFloat(month) - 1 ||
      birthday.getDate() !== parseFloat(day)) {
      info.isTrue = false;
    } else {
      info.isTrue = true;
      info.year = birthday.getFullYear();
      info.month = birthday.getMonth() + 1;
      info.day = birthday.getDate();
      if (p % 2 === 0) {
        info.isFemale = true;
        info.isMale = false;
      } else {
        info.isFemale = false;
        info.isMale = true;
      }
    }
    return info;
  }

  if (cardNo.length === 18) {
    const year = cardNo.substring(6, 10);
    const month = cardNo.substring(10, 12);
    const day = cardNo.substring(12, 14);
    const p = cardNo.substring(14, 17);
    const birthday = new Date(year,
      parseFloat(month) - 1,
      parseFloat(day), 12, 0, 0, 0);

    // 这里用getFullYear()获取年份，避免千年虫问题
    if (birthday.getFullYear() !== parseFloat(year) ||
      birthday.getMonth() !== parseFloat(month) - 1 ||
      birthday.getDate() !== parseFloat(day)) {
      info.isTrue = false;
      return info;
    }

    const Wi = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1]; // 加权因子
    const Y = [1, 0, 10, 9, 8, 7, 6, 5, 4, 3, 2]; // 身份证验证位值.10代表X

    // 验证校验位
    let sum = 0; // 声明加权求和变量
    const _cardNo = cardNo.split('');

    if (_cardNo[17].toLowerCase() === 'x') {
      _cardNo[17] = 10; // 将最后位为x的验证码替换为10方便后续操作
    }
    for (let i = 0; i < 17; i++) {
      sum += Wi[i] * _cardNo[i]; // 加权求和
    }
    const i = sum % 11; // 得到验证码所位置

    if (_cardNo[17] !== Y[i]) {
      info.isTrue = false;
      return info;
    }

    info.isTrue = true;
    info.year = birthday.getFullYear();
    info.month = birthday.getMonth() + 1;
    info.day = birthday.getDate();

    if (p % 2 === 0) {
      info.isFemale = true;
      info.isMale = false;
    } else {
      info.isFemale = false;
      info.isMale = true;
    }
    return info;
  }
  return info;
};

module.exports = Validator;

date formatting

Need to introduce a package, moment is more convenient to deal with time.

const moment = require('moment');

const DateHandler = {};

/**
 * 获取现在时间(13位时间戳) 1641185119507
 * @returns {number|*}
 */
DateHandler.getNowTime = () => {
  return new Date().getTime();
};

/**
 * 格式化时间戳
 * @param timestamp
 * @param patten
 */
DateHandler.formatDate = (timestamp, patten) => {
  console.log(timestamp);
  return moment(timestamp).format(patten);
};

/**
 * excel读取2018/01/01这种时间格式是会将它装换成数字类似于46254.1545151415
 * @param numb numb是传过来的整数数字
 * @param format 是之间间隔的符号
 * @returns {string}
 */
DateHandler.formatExcelDate = (numb, format) => {
  const time = new Date((numb - 1) * 24 * 3600000 + 1);
  time.setYear(time.getFullYear() - 70);
  const year = `${time.getFullYear()}`;
  const month = `${time.getMonth() + 1}`;
  const date = `${time.getDate() - 1}`;
  if (format && format.length === 1) {
    return year + format + month + format + date;
  }
  return year + (month < 10 ? `0${month}` : month) + (date < 10 ? `0${date}` : date);
};

/**
 * 毫秒格式化
 * @param t (ms)
 * @returns {string}
 */
DateHandler.formatTime = (t) => {
  const HOUR = 1000 * 60 * 60;
  const d = parseInt(t / (HOUR * 24));
  const h = parseInt((t % (HOUR * 24)) / (HOUR));
  const m = parseInt((t % (HOUR)) / (1000 * 60));
  const s = parseInt((t % (1000 * 60)) / 1000);

  let text = '';
  d && (text += `${d}天`);
  h && (text += `${h}小时`);
  m && (text += `${m}分`);
  s && (text += `${s}秒`);
  return text || '-';
};

module.exports = DateHandler;

random number generation

The packages that need to be used are randomstring, lodash, dateformat

const randomstring = require('randomstring');
const dateformat = require('dateformat');
const _ = require('lodash');

/**
 * an integer between start and end
 * @param start
 * @param end
 * @returns {number}
 * @constructor
 */
NumHandler.Random = (start, end) => {
  return _.random(start, end);
};

NumHandler.removeEmptyField = (list, field) => {
  list.forEach(v => (v[field].length === 0 ? delete v[field] : this.removeEmptyField(v[field], field)));
  return list;
};

/**
 * 生成随机编号
 * @param n 位数
 * @param collection
 * @returns {string}
 */
NumHandler.generateRandom = (n, collection = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']) => {
  let res = '';
  for (let i = 0; i < n; i++) {
    const id = Math.ceil(Math.random() * (collection.length - 1));
    res += collection[id];
  }
  return res;
};


const Collection_Num = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
NumHandler.generateUUID = () => {
  const Collection_Alpha = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'];
  return NumHandler.generateRandom(31, Collection_Num.concat(Collection_Alpha));
};

/**
 * 生成订单编号
 *
 * @static
 */
NumHandler.generateOrderCode = () => {
  const time = dateformat(this.getNowTime(), 'yyyymmddHHMMss');
  const randNumber = this.generateRandom(3, Collection_Num);
  return `${time}${randNumber}`;
};

/**
 * 生成序列号
 *
 * @static
 * @returns
 */
NumHandler.generateSerNum = () => {
  const time = dateformat(this.getNowTime(), 'yyyymmddHHMMss');
  const randomNum = randomstring.generate({ length: 12, charset: 'numeric' });
  return `${time}2${randomNum}`;
};

module.exports = NumHandler;

Summarize

If a worker wants to do a good job, he must first sharpen his tools. With this weapon of your own, maybe you won't be too cowardly when protesting overtime~