JSFiddle - React, Tailwind, and code Playground

JavaScript

function User(id,pin,amount) {
    this.id = id,
    this.pin = pin,
    this.amount = amount
}
var memory = [];
    var user = new User("aaa", "fff");
    user = JSON.stringify(user);
    memory.push(user);
    
    var user2 = new User("bbb", "ggg");
    user2 = JSON.stringify(user2);
    memory.push(user2);
    window.localStorage.setItem('user', JSON.stringify(memory));
    
var data = window.localStorage.getItem('user');
console.log(data);
data = JSON.parse(data);
for (var i=0; i< data.length; i++) {
  if (JSON.parse(data[i]).id == "bbb") {
    console.log("matched", data[i])    
  } else { 
    console.log(data[i])
  }
}