25个JavaScript正则表达式汇总

阳光穿透心脏的1/2处 2022-08-28 04:44 144阅读 0赞

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整理一部分比较常用的正则表达式

**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 sfzReg = /^[1-9]\d{5}(18|19|([23]\d))\d{2}((0[1-9])|(10|11|12))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$/
    
    
    const sfzStr1 = '415106199801012130'
    console.log(sfzReg.test(sfzStr1)) // true
    
    
    const sfzStr2 = '718381298381212183'
    console.log(sfzReg.test(sfzStr2)) // 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)) // true
    console.log(emailReg.test(emailStrQQ)) // true
    
    
    const 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)) // true
    
    
    const 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)) // true
    
    
    const 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)) // true
    
    
    const 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)) // true
    
    
    const dateStr2 = '2021-01-01 1'
    console.log(dateReg.test(dateStr2)) // false

**8、日期 YYYY-MM-DD hh:mm:ss**

const dateReg = /^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2}) (\d{1,2}):(\d{1,2}):(\d{1,2})$/
    
    
    const dateStr1 = '2021-10-10 16:16:16'
    console.log(dateReg.test(dateStr1)) // true
    
    
    const dateStr2 = '2021-10-10 16:'
    console.log(dateReg.test(dateStr2)) // false

**9、整数的校验**

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

**10、小数的校验**

const floatReg = /^[-\+]?\d+(\.\d+)?$/
    
    
    const floatNum = 1234.5
    console.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 = 1234.5
    console.log(floatReg.test(floatNum1)) // true
    
    
    const floatNum2 = 1234.55
    console.log(floatReg.test(floatNum2)) // true
    
    
    const floatNum3 = 1234.555
    console.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)) // true
    
    
    const postalNoStr2 = '5220000'
    console.log(postalNoReg.test(postalNoStr2)) // false

**13、QQ号的校验（5-11位数字）**

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

**14、微信号的校验（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)) // true
    
    
    const 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)) // true
    
    
    const 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)) // true
    
    
    const 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)) // true
    
    
    const cnStr2 = 'sunshine_Lin'
    console.log(cnReg.test(cnStr2)) // false

**18、密码强度的校验（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)) // true
    
    
    const 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)) // true
    
    
    const 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)) // true
    const filename2 = 'sunshine.png'
    console.log(filenameReg.test(filename2)) // true
    const filename3 = 'sunshine.txt'
    console.log(filenameReg.test(filename3)) // true
    const filename4 = 'sunshine.md'
    console.log(filenameReg.test(filename4)) // false

**21、匹配img和src**

const imgReg = /<img.*?src=[\"|\']?(.*?)[\"|\']?\s.*?>/ig
    
    
    const 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
    // ]

**22、匹配html中的注释**

const noteReg = //g
    
    
    const htmlStr = ' <div></div>  <div></div>'
    
    
    console.log(noteReg.exec(htmlStr))
    // [
    //   '',
    //   '一个div标签',
    //   index: 0,
    //   input: ' <div></div>  <div></div>',
    //   groups: undefined
    // ]
    console.log(noteReg.exec(htmlStr))
    // [
    //   '',
    //   '一个div标签',
    //   index: 27,
    //   input: ' <div></div>  <div></div>',
    //   groups: undefined
    // ]

**23、匹配html中的style**

const styleReg = /([(\s+\w+=)|>])/g
    
    
    const htmlStr = '<div><span></span></div>'
    
    
    console.log(styleReg.exec(htmlStr))
    // [
    //   '>',
    //   '>',
    //   index: 5,
    //   input: '<div><span></span></div>',
    //   groups: undefined
    // ]
    console.log(styleReg.exec(htmlStr))
    // [
    //   '>',
    //   '>',
    //   index: 36,
    //   input: '<div><span></span></div>',
    //   groups: undefined
    // ]

**24、匹配html中的颜色**

const colorReg = /#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})/g
    
    
    const htmlStr = '<div><span></span></div>'
    
    
    console.log(colorReg.exec(htmlStr))
    // [
    //   '#000',
    //   '000',
    //   index: 23,
    //   input: '<div><span></span></div>',
    //   groups: undefined
    // ]
    console.log(colorReg.exec(htmlStr))
    // [
    //   '#fff',
    //   'fff',
    //   index: 49,
    //   input: '<div><span></span></div>',
    //   groups: undefined
    // ]

**25、匹配htmlTag（html标签）**

const endReg = /<("[^"]*"|'[^']*'|[^'">])*>/g
    
    
    const htmlStr = '<div><span></span></div><h1></h1>'
    
    
    console.log(endReg.exec(htmlStr))
    console.log(endReg.exec(htmlStr))
    console.log(endReg.exec(htmlStr))
    console.log(endReg.exec(htmlStr))
    console.log(endReg.exec(htmlStr))
    console.log(endReg.exec(htmlStr))

总结

感谢您的阅读，祝编程愉快！

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