21个最常用正则

2022 年 03 月 19 日

453 次浏览

5279字数

1、手机号码的校验

const phoneReg = /^[1][3,4,5,6,7,8,9][0-9]{9}$/
const phoneStr1 = '18886233487'
console.log(phoneReg.test(phoneStr1)) // true
const phoneStr2 = '17283017203897'
console.log(phoneReg.test(phoneStr2)) // false

2、身份证的校验

const phoneReg = /^[1][3,4,5,6,7,8,9][0-9]{9}$/const phoneStr1 = '18886233487'console.log(phoneReg.test(phoneStr1)) // trueconst phoneStr2 = '17283017203897'console.log(phoneReg.test(phoneStr2)) // false

3、邮箱的校验

const emailReg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/const emailStrWY = '956666@163.com' // 163邮箱const emailStrQQ = '956666@qq.com' // qq邮箱console.log(emailReg.test(emailStrWY)) // trueconsole.log(emailReg.test(emailStrQQ)) // trueconst noEmail = '72873213.com'console.log(emailReg.test(noEmail)) // false

4、URL的校验

const urlReg = /^((https?|ftp|file):\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$/const urlStr1 = 'https://haha.sunshine.com/xxx/xxx'console.log(urlReg.test(urlStr1)) // trueconst urlStr2 = 'sss://haha.sunshine.com/xxx/xxx'console.log(urlReg.test(urlStr2)) // false

5、IPv4的校验

const ipv4Reg = /^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/const ipv4Str1 = '122.12.56.65'console.log(ipv4Reg.test(ipv4Str1)) // trueconst ipv4Str2 = '122.12.56.655'console.log(ipv4Reg.test(ipv4Str2)) // false

6、16进制颜色的校验

const color16Reg = /^#?([a-fA-F0-9]{6}|[a-fA-F0-9]{3})$/const color16Str1 = '#fff'console.log(color16Reg.test(color16Str1)) // trueconst color16Str2 = '#1234567'console.log(color16Reg.test(color16Str2)) // false

7、日期 YYYY-MM-DD

const dateReg = /^\d{4}(\-)\d{1,2}\1\d{1,2}$/const dateStr1 = '2021-10-10'console.log(dateReg.test(dateStr1)) // trueconst dateStr2 = '2021-01-01 1'console.log(dateReg.test(dateStr2)) // false

8、日期 YYYY-MM-DD hh:mm:ss

const dateReg = /^\d{4}(\-)\d{1,2}\1\d{1,2}$/const dateStr1 = '2021-10-10'console.log(dateReg.test(dateStr1)) // trueconst dateStr2 = '2021-01-01 1'console.log(dateReg.test(dateStr2)) // false

9、整数的校验

const intReg = /^[-+]?\d*$/const intNum1 = 12345console.log(intReg.test(intNum1)) // trueconst intNum2 = 12345.1console.log(intReg.test(intNum2)) // false

10、小数的校验

const floatReg = /^[-\+]?\d+(\.\d+)?$/const floatNum = 1234.5console.log(floatReg.test(floatNum)) // true

11、保留n位小数

function checkFloat(n) {  return new RegExp(`^([1-9]+[\d]*(.[0-9]{1,${n}})?)$`)}// 保留2位小数const floatReg = checkFloat(2)const floatNum1 = 1234.5console.log(floatReg.test(floatNum1)) // trueconst floatNum2 = 1234.55console.log(floatReg.test(floatNum2)) // trueconst floatNum3 = 1234.555console.log(floatReg.test(floatNum3)) // false

12、邮政编号的校验

const postalNoReg = /^\d{6}$/const postalNoStr1 = '522000'console.log(postalNoReg.test(postalNoStr1)) // trueconst postalNoStr2 = '5220000'console.log(postalNoReg.test(postalNoStr2)) // false

13、QQ号的校验

const qqReg = /^[1-9][0-9]{4,10}$/const qqStr1 = '1915801633'console.log(qqReg.test(qqStr1)) // trueconst qqStr2 = '191580163333'console.log(qqReg.test(qqStr2)) // false

14、微信号的校验（说明：6至20位，以字母开头，字母，数字，减号，下划线）

const wxReg = /^[a-zA-Z]([-_a-zA-Z0-9]{5,19})+$/const wxStr1 = 'linsanxin885577'console.log(wxReg.test(wxStr1)) // trueconst wxStr2 = '厉害了我的vx'console.log(wxReg.test(wxStr2)) // false

15、车牌号的校验

const carNoReg = /^[京津沪渝冀豫云辽黑湘皖鲁新苏浙赣鄂桂甘晋蒙陕吉闽贵粤青藏川宁琼使领A-Z]{1}[A-Z]{1}[A-Z0-9]{4}[A-Z0-9挂学警港澳]{1}$/const carNoStr1 = '粤A12345'console.log(carNoReg.test(carNoStr1)) // trueconst carNoStr2 = '广东A12345'console.log(carNoReg.test(carNoStr2)) // false

16、只含字母的字符串

const letterReg = /^[a-zA-Z]+$/const letterStr1 = 'sunshineLin'console.log(letterReg.test(letterStr1)) // trueconst letterStr2 = 'sunshine_Lin'console.log(letterReg.test(letterStr2)) // false

17、包含中文的字符串

const cnReg = /[\u4E00-\u9FA5]/const cnStr1 = '我是sunshine_Lin，林三心'console.log(cnReg.test(cnStr1)) // trueconst cnStr2 = 'sunshine_Lin'console.log(cnReg.test(cnStr2)) // false

18、密码强度的校验（说明：密码中必须包含字母、数字、特称字符，至少8个字符，最多30个字符）

const passwordReg = /(?=.*[0-9])(?=.*[a-zA-Z])(?=.*[^a-zA-Z0-9]).{8,30}/const password1 = 'sunshine_Lin12345..'console.log(passwordReg.test(password1)) // trueconst password2 = 'sunshineLin12345'console.log(passwordReg.test(password2)) // false

19、字符串长度n的校验

function checkStrLength(n) {  return new RegExp(`^.{${n}}$`)}// 校验长度为3的字符串const lengthReg = checkStrLength(3)const str1 = 'hhh'console.log(lengthReg.test(str1)) // trueconst str2 = 'hhhhh'console.log(lengthReg.test(str2)) // false

20、文件拓展名的校验

function checkFileName (arr) {  arr = arr.map(name => `.${name}`).join('|')  return new RegExp(`(${arr})$`)}const filenameReg = checkFileName(['jpg', 'png', 'txt'])const filename1 = 'sunshine.jpg'console.log(filenameReg.test(filename1)) // trueconst filename2 = 'sunshine.png'console.log(filenameReg.test(filename2)) // trueconst filename3 = 'sunshine.txt'console.log(filenameReg.test(filename3)) // trueconst filename4 = 'sunshine.md'console.log(filenameReg.test(filename4)) // false

21、匹配img和src

const imgReg = /<img.*?src=[\"|\']?(.*?)[\"|\']?\s.*?>/igconst htmlStr = '<div></div><img src="sunshine.png" /><img src="sunshine111.png" />'console.log(imgReg.exec(htmlStr))// [//   '<img src="sunshine.png" />',//   'sunshine.png',//   index: 11,//   input: '<div></div><img src="sunshine.png" /><img src="sunshine111.png" />',//   groups: undefined// ]console.log(imgReg.exec(htmlStr))// [//   '<img src="sunshine111.png" />',//   'sunshine111.png',//   index: 37,//   input: '<div></div><img src="sunshine.png" /><img src="sunshine111.png" />',//   groups: undefined// ]

21个最常用正则