Work with array of objects in browser local storage

Add methods to work with objects in local storage

    $(document).ready(function () {

        Storage.prototype.setObj = function (key, obj) {
            return this.setItem(key, JSON.stringify(obj))
        }
        Storage.prototype.getObj = function (key) {
            return JSON.parse(this.getItem(key))
        }

        var myObj = [];
        localStorage.setObj('myObj', myObj);
    });


Save item in local storage

    function SaveItem() {
        var myObj = localStorage.getObj('myObj');

        var objNome = $('#txtFstName').val();
        var objApelido = $('#txtLastName').val();
       
        var obj = { 'fstName': objNome, 'lastName': objApelido, 'age': 32 };
        myObj.push(obj);

        localStorage.setObj('myObj', myObj);
    }

Get data

    function ShowItem() {
        var aux = localStorage.getObj('myObj');

        console.log(aux);
    }