关于javascript:常见正则应用

通过name获取url query参数

const getQueryByName = (name) => {  const queryNameRegex = new RegExp(`[?&]${name}=([^&]*)(&|$)`)  const queryNameMatch = window.location.search.match(queryNameRegex)  // 个别都会通过decodeURIComponent解码解决  return queryNameMatch ? decodeURIComponent(queryNameMatch[1]) : ''}

将字符串首字母转化为大写，剩下为小写

const capitalize = (string) => {  const capitalizeRegex = /(?:^|\s+)\w/g  return string.toLowerCase().replace(capitalizeRegex, (match) => match.toUpperCase())}

将字符串驼峰化

const camelCase = (string) => {  const camelCaseRegex = /[-_\s]+(.)?/g  return string.replace(camelCaseRegex, (match, char) => {    return char ? char.toUpperCase() : ''  })}

常见手机号解决

手机号码两头四位数字用*示意

const phone = '133123456789'const phoneReg = /^(\d{3})(\d{4})(\d{4})$/const sphone = phone.replace(phoneReg, '$1--$3')