let phone = 15676765656;
let reg = /^(\d{3})(\d{4}){\d{4}}$/; //分成三段,匹配手机号码
let num = phone.replace(reg,'$1****$2'); //输出num = 156****5656;
let phone = 15676765656;
let reg = /^(\d{3})(\d{4}){\d{4}}$/; //分成三段,匹配手机号码
let num = phone.replace(reg,'$1****$2'); //输出num = 156****5656;