validator.js是一个Github上专门针对字符串校验所建立的一个工具库，validator.js包含了大量实用的字符串校验和清洗方法，并且支持在Node环境和浏览器环境使用，非常实用。
https://Github.com/validatorjs/validator.js
安装实用包管理方式安装
npm install validator
//或者
yarn add validator
可以在各种开发场景下使用
- 不在es6环境下的模块化
var validator = require('validator');
validator.isEmail('foo@bar.com'); //=> true
- es6的模块化
可以一次性全部导入
import validator from 'validator';
也可以针对不同方法单独引入，比如我们只需要导入验证邮箱的方法
import isEmail from 'validator/lib/isEmail';
或者Tree-shakeable ES imports导入
import isEmail from 'validator/es/lib/isEmail';
- 浏览器直接使用
<script type="text/javascript" src="validator.min.js"></script>
<script type="text/javascript">
validator.isEmail('foo@bar.com'); //=> true
</script>
方法非常丰富，可以根据需要进行使用，建议先看一下Github上中每个方法的含义和使用方式。
import toDate from './lib/toDate';
import toFloat from './lib/toFloat';
import toInt from './lib/toInt';
import toBoolean from './lib/toBoolean';
import equals from './lib/equals';
import contains from './lib/contains';
import matches from './lib/matches';
import isEmail from './lib/isEmail';
import isURL from './lib/isURL';
import isMACAddress from './lib/isMACAddress';
import isIP from './lib/isIP';
import isIPRange from './lib/isIPRange';
import isFQDN from './lib/isFQDN';
import isDate from './lib/isDate';
import isBoolean from './lib/isBoolean';
import isLocale from './lib/isLocale';
import isAlpha, { locales as isAlphaLocales } from './lib/isAlpha';
import isAlphanumeric, { locales as isAlphanumericLocales } from './lib/isAlphanumeric';
import isNumeric from './lib/isNumeric';
import isPassportNumber from './lib/isPassportNumber';
import isPort from './lib/isPort';
import isLowercase from './lib/isLowercase';
import isUppercase from './lib/isUppercase';
import isIMEI from './lib/isIMEI';
import isAscii from './lib/isAscii';
import isFullWidth from './lib/isFullWidth';
import isHalfWidth from './lib/isHalfWidth';
import isVariableWidth from './lib/isVariableWidth';
import isMultibyte from './lib/isMultibyte';
import isSemVer from './lib/isSemVer';
import isSurrogatePair from './lib/isSurrogatePair';
import isInt from './lib/isInt';
import isFloat, { locales as isFloatLocales } from './lib/isFloat';
import isDecimal from './lib/isDecimal';
import isHexadecimal from './lib/isHexadecimal';
import isOctal from './lib/isOctal';
import isDivisibleBy from './lib/isDivisibleBy';
import isHexColor from './lib/isHexColor';
import isRgbColor from './lib/isRgbColor';
import isHSL from './lib/isHSL';
import isISRC from './lib/isISRC';
import isIBAN, { locales as ibanLocales } from './lib/isIBAN';
import isBIC from './lib/isBIC';
import isMD5 from './lib/isMD5';
import isHash from './lib/isHash';
import isJWT from './lib/isJWT';
import isJSON from './lib/isJSON';
import isEmpty from './lib/isEmpty';
import isLength from './lib/isLength';
import isByteLength from './lib/isByteLength';
import isUUID from './lib/isUUID';
import isMongoId from './lib/isMongoId';
import isAfter from './lib/isAfter';
import isBefore from './lib/isBefore';
import isIn from './lib/isIn';
import isCreditCard from './lib/isCreditCard';
import isIdentityCard from './lib/isIdentityCard';
import isEAN from './lib/isEAN';
import isISIN from './lib/isISIN';
import isISBN from './lib/isISBN';
import isISSN from './lib/isISSN';
import isTaxID from './lib/isTaxID';
import isMobilePhone, { locales as isMobilePhoneLocales } from './lib/isMobilePhone';
import isEthereumAddress from './lib/isEthereumAddress';
import isCurrency from './lib/isCurrency';
import isBtcAddress from './lib/isBtcAddress';
import isISO8601 from './lib/isISO8601';
import isRFC3339 from './lib/isRFC3339';
import isISO31661Alpha2 from './lib/isISO31661Alpha2';
import isISO31661Alpha3 from './lib/isISO31661Alpha3';
import isISO4217 from './lib/isISO4217';
import isBase32 from './lib/isBase32';
import isBase58 from './lib/isBase58';
import isBase64 from './lib/isBase64';
import isDataURI from './lib/isDataURI';
import isMagnetURI from './lib/isMagnetURI';
import isMimeType from './lib/isMimeType';
import isLatLong from './lib/isLatLong';
import isPostalCode, { locales as isPostalCodeLocales } from './lib/isPostalCode';
import ltrim from './lib/ltrim';
import rtrim from './lib/rtrim';
import trim from './lib/trim';
import escape from './lib/escape';
import unescape from './lib/unescape';
import stripLow from './lib/stripLow';
import whitelist from './lib/whitelist';
import blacklist from './lib/blacklist';
import isWhitelisted from './lib/isWhitelisted';
import normalizeEmail from './lib/normalizeEmail';
import isSlug from './lib/isSlug';
import isLicensePlate from './lib/isLicensePlate';
import isStrongPassword from './lib/isStrongPassword';
import isVAT from './lib/isVAT';
validator.js是一个非常值得学习的工具库，不仅是使用它，也可以用它来学习一些JavaScript的基础知识，学习其中各类方法的写法，也可以巩固JavaScript的基础知识！
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