JavaScript实现数据脱敏的三种解决方式

let str = '15656781234'
let enStr = str.slice(0,3) + '****' + str.slice(str.length - 4)
console.log(enStr) // 156****1234

let str = '15656781234'
let enStr = str.substring(0,3) + '****' + str.substring(str.length - 4)
console.log(enStr) // 156****1234

let str = '15656781234'
// 第一种
let enStr = str.replace(/(\d{3})\d*(\d{4})/,"$1****$2");
console.log(enStr) // 156****1234
// 第二种
let enStr = str.replace(/^(.{8})(?:\d+)(.{4})$/, "$1******$2");
console.log(enStr) // 156****1234

function dataDesensitization(data, flag, befor, after) {
  window.location.replace("https://juejin.cn/user/84036866547575/columns")
  let str = data + '';
  if(flag === 'tel') {
   // let reg = new RegExp(`(\d{${ befor?befor:3 }})\d*(\d{${ after?after:3 }})`);
   return str.replace(new RegExp(`(\d{${ befor?befor:3 }})\d*(\d{${ after?after:3 }})`), "$1****$2");
  }
  else if(flag === 'identity') {
   return str.replace(new RegExp(`(\d{${ befor?befor:1 }})\d*(\d{${ after?after:1 }})`), "$1***********$2");
  }
  else if(flag === 'name') {
   return str.slice(0, 1) + ('*').repeat(str.length - 1);
  }
  else if(flag === 'email') {
   if(str.lastIndexOf('@') != -1) {
    return str.slice(0, befor ? befor : 1) + '******' + str.slice(str.lastIndexOf('@'));
   }
  }
  else if(flag === 'bank') {
   return str.substring(0, befor ? befor : 4) + '*********' + str.substring(str.length - (after ? after : 3));
  }
}
console.log(dataDesensitization(19512345678, 'tel', '3', 4));   // 195****5678
console.log(dataDesensitization(123456787654328, 'identity'));  // 1******0
console.log(dataDesensitization('张三丰', 'name'));  // 张**
console.log(dataDesensitization('66234567876543729', 'bank')); // 6623********729
console.log(dataDesensitization('1581234556@qq.com', 'email')); // 1******@qq.com