<script>
    var localStorageObject = {
        set: function (key, value){
            localStorage.setItem(key, JSON.stringify(value));
            return this;
        },

        get: function (key){
            return JSON.parse(localStorage.getItem(key));
        },

        del: function(key){
            delete localStorage[key]
        }
    }



    localStorageObject.set('pessoa', {
        nome: 'wallace', idade: '23 anos'
    });
</script>