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JS Forms

JS Forms Forms API

JS Objects

Object Definitions Object Properties Object Methods Object Display Object Accessors Object Constructors Object Prototypes Object ECMAScript 5 Object Classes

JS Functions

Function Definitions Function Parameters Function Invocation Function Call Function Apply Function Closures

JS HTML DOM

DOM Intro DOM Methods DOM Document DOM Elements DOM HTML DOM CSS DOM Animations DOM Events DOM Event Listener DOM Navigation DOM Nodes DOM Collections DOM Node Lists

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JS JSON

JSON Intro JSON Syntax JSON vs XML JSON Data Types JSON Parse JSON Stringify JSON Objects JSON Arrays JSON PHP JSON HTML JSON JSONP

JS Web APIs

Web API Intro Web History API Web Storage API Web Geolocation API

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JS References

JavaScript Objects HTML DOM Objects


Web Storage API


The Web Storage API is a simple syntax for storing and retrieving data in the browser. It is very easy to use:

Example

localStorage.setItem("name", "John Doe");
localStorage.getItem("name");
Try it Yourself »

The Web Storage API is supported in all browsers:

Yes Yes Yes Yes Yes

The localStorage Object

The localStorage object provides access to a local storage for a particular Web Site. It allows you to store, read, add, modify, and delete data items for that domain.

The data is stored with no expiration date, and will not be deleted when the browser is closed.

The data will be available for days, weeks, and years.


The setItem() Method

The localStorage.setItem() method stores a data item in a storage.

It takes a name and a value as parameters:

Example

localStorage.setItem("name", "John Doe");

The getItem() Method

The localStorage.getItem() method retrieves a data item from the storage.

It takes a name as parameter:

Example

localStorage.getItem("name");


The sessionStorage Object

The sessionStorage object is identical to the localStorage object.

The difference is that the sessionStorage object stores data for one session.

The data is deleted when the browser is closed.

Example

sessionStorage.getItem("name");
Try it Yourself »

The setItem() Method

The sessionStorage.setItem() method stores a data item in a storage.

It takes a name and a value as parameters:

Example

sessionStorage.setItem("name", "John Doe");

The getItem() Method

The sessionStorage.getItem() method retrieves a data item from the storage.

It takes a name as parameter:

Example

sessionStorage.getItem("name");

Storage Object Properties and Methods

Property/Method Description
key(n) Returns the name of the nth key in the storage
length Returns the number of data items stored in the Storage object
getItem(keyname) Returns the value of the specified key name
setItem(keyname, value) Adds that key to the storage, or update that key's value if it already exists
removeItem(keyname) Removes that key from the storage
clear() Empty all key out of the storage

Related Pages for Web Storage API

Property Description
window.localStorage Allows to save key/value pairs in a web browser. Stores the data with no expiration date
window.sessionStorage Allows to save key/value pairs in a web browser. Stores the data for one session