javascript save data to local storage

var testObject = { 'one': 1, 'two': 2, 'three': 3 };

// Put the object into storage
localStorage.setItem('testObject', JSON.stringify(testObject));

// Retrieve the object from storage
var retrievedObject = localStorage.getItem('testObject');

console.log('retrievedObject: ', JSON.parse(retrievedObject));localStorage.setItem('myCat', 'Tom');

var cat = localStorage.getItem('myCat');

localStorage.removeItem('myCat');

// Clear all items
localStorage.clear();
var KeyName = window.localStorage.key(index);// Store
localStorage.lastname = "Smith";
// Retrieve
document.getElementById("result").innerHTML = localStorage.lastname;
// Remove
localStorage.removeItem("lastname");