一百行JS代码实现一个校验工具

export default class Coi {
  constructor(prop) {
    this.input = prop
    this.errorMessage = '通过校验' // 错误信息
    this.pass = true // 校验是否通过
  }
  // 数据输入
  data(input) {
    if (!this.pass) return this
    this.input = input
    return this
  }
  // 必填，不能为空
  isRequired(message) {
    if (!this.pass) return this
    if (
      /^\s*$/g.test(this.input) ||
      this.input === null ||
      this.input === undefined
    ) {
      this.errorMessage = message
      this.pass = false
    }
    return this
  }
  // 最小长度
  minLength(length, message) {
    if (!this.pass) return this
    if (this.input.length < length) {
      this.errorMessage = message
      this.pass = false
    }
    return this
  }
  // 最大长度
  maxLength(length, message) {
    if (!this.pass) return this
    if (this.input.length > length) {
      this.errorMessage = message
      this.pass = false
    }
    return this
  }
  // 需要的格式 number: 数字, letter: 字母, chinese: 中文
  requireFormat(formatArray, message) {
    if (!this.pass) return this
    let formatMap = {
      number: 0,
      letter: 0,
      chinese: 0
    }
    Object.keys(formatMap).forEach(key => {
      if (formatArray.includes(key)) formatMap[key] = 1
    })
    let formatReg = new RegExp(
      `^[${formatMap.number ? '0-9' : ''}${
        formatMap.letter ? 'a-zA-Z' : ''
      }${formatMap.chinese ? '\u4e00-\u9fa5' : ''}]*$`
    )
    if (!formatReg.test(this.input)) {
      this.errorMessage = message
      this.pass = false
    }
    return this
  }
  // 邮箱校验
  isEmail(message) {
    if (!this.pass) return this
    const emailReg = /^[a-z0-9]+([._\\-]*[a-z0-9])*@([a-z0-9]+[-a-z0-9]*[a-z0-9]+.){1,63}[a-z0-9]+$/
    if (!emailReg.test(this.input)) {
      this.errorMessage = message
      this.pass = false
    }
    return this
  }
  // ulr校验
  isURL(message) {
    if (!this.pass) return this
    const urlReg = new RegExp(
      '^(?!mailto:)(?:(?:http|https|ftp)://|//)(?:\\S+(?::\\S*)?@)?(?:(?:(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}(?:\\.(?:[0-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))|(?:(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)(?:\\.(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)*(?:\\.(?:[a-z\\u00a1-\\uffff]{2,})))|localhost)(?::\\d{2,5})?(?:(/|\\?|#)[^\\s]*)?$',
      'i'
    )
    if (!urlReg.test(this.input)) {
      this.errorMessage = message
      this.pass = false
    }
    return this
  }
  // 自定义正则校验
  requireRegexp(reg, message) {
    if (!this.pass) return this
    if (!reg.test(this.input)) {
      this.errorMessage = message
      this.pass = false
    }
    return this
  }
}

import Coi from 'js-coi'
const validCoi = new Coi()
validCoi
  .data('1234')
  .isRequired('id不能为空')
  .minLength(3, 'id不能少于3位')
  .maxLength(5, 'id不能多于5位')
  .data('1234@qq.')
  .isRequired('邮箱不能为空')
  .isEmail('邮箱格式不正确')
  .data('http:dwd')
  .isRequired('url不能为空')
  .isUrl('url格式不正确')
if (!validCoi.pass) {
  this.$message.error(validCoi.errorMessage)
  return
}

import Coi from 'js-coi'
const idCoi = new Coi('1234')
idCoi
  .isRequired('id不能为空')
  .minLength(3, 'id不能少于3位')
  .maxLength(5, 'id不能多于5位')
  .isEmail('id邮箱格式不正确')
  .isUrl('id格式不正确')
  .requireFormat(['number', 'letter', 'chinese'], 'id格式不正确')
  .requireRegexp(/012345/, 'id格式不正确')
if (!idCoi.pass) {
  this.$message.error(idCoi.errorMessage)
  return
}