some useful regex

regex.js

// mobile phone numbers in china
const reg = /^1(?:3\d|4[4-9]|5[0-35-9]|6[67]|7[013-8]|8\d|9\d)\d{8}$/

// image tag
const regex = /<img([\s\S]*?)src\s*=\s*(['"])([\s\S]*?)\2([^>]*)>/gi

// only chinese charactors and letters

const regex = /^[\u4e00-\u9fa5a-zA-Z]+$/
// email

const reg = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;