将手机号中间四位转换为 * 号

使用正则将手机号中间四位转换为 * 号：

let mobile = "131 0000 8080"
function convertMobile(mobile){
  const mobileReg = /(d{3})(d{4})(d{4})/ig;
  let mobileCalc = mobile.replace(/s+/ig,"");
  mobileCalc = mobileCalc.replace(mobileReg,"$1****$3");
  return mobileCalc;
}
convertMobile(mobile); //131****8080

来自：https://www.jianshu.com/p/7ef31e4a3587