The localStorage Object

// Store
localStorage.setItem("lastname", "Smith");

// Retrieve
document.getElementById("result").innerHTML = localStorage.getItem("lastname");
// Store
localStorage.lastname = "Smith";
// Retrieve
document.getElementById("result").innerHTML = localStorage.lastname;
//the following example counts the number of times a user has clicked 
//a button. In this code the value string is converted to a number to be 
//able to increase the counter

if (localStorage.clickcount) {
  localStorage.clickcount = Number(localStorage.clickcount) + 1;
} else {
  localStorage.clickcount = 1;
document.getElementById("result").innerHTML = "You have clicked the button " +
localStorage.clickcount + " time(s).";
  • Stores the data with no expiration date.
  • The data will not be deleted when the browser is closed, and will be available the next day, week, or year.
  • Name/value pairs are always stored as strings. Remember to convert them to another format when needed!.

Related concepts

The localStorage Object — Structure map

Clickable & Draggable!

The localStorage Object — Related pages: