license: Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing,
     software distributed under the License is distributed on an
     "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     KIND, either express or implied.  See the License for the
     specific language governing permissions and limitations
     under the License.

localStorage

Provides access to a W3C Storage interface

var storage = window.localStorage;

Methods

  • key: Returns the name of the key at the specified position.
  • getItem: Returns the item identified by the specified key.
  • setItem: Assigns a keyed item's value.
  • removeItem: Removes the item identified by the specified key.
  • clear: Removes all of the key/value pairs.

Details

The window.localStorage interface is based on the W3C Web Storage interface. An app can use it to save persistent data using key-value pairs. The window.sessionStorage interface works the same way, but all data is cleared each time the app closes.

Supported Platforms

  • Android
  • BlackBerry WebWorks (OS 6.0 and higher)
  • iOS
  • Tizen
  • Windows Phone 7 and 8

Key Quick Example

var keyName = window.localStorage.key(0);

Set Item Quick Example

window.localStorage.setItem("key", "value");

Get Item Quick Example

    var value = window.localStorage.getItem("key");
    // value is now equal to "value"

Remove Item Quick Example

    window.localStorage.removeItem("key");

Clear Quick Example

    window.localStorage.clear();

Full Example

<!DOCTYPE html>
<html>
  <head>
    <title>Storage Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-x.x.x.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Wait for device API libraries to load
    //
    document.addEventListener("deviceready", onDeviceReady, false);

    // device APIs are available
    //
    function onDeviceReady() {
        window.localStorage.setItem("key", "value");
        var keyname = window.localStorage.key(i);
        // keyname is now equal to "key"
        var value = window.localStorage.getItem("key");
        // value is now equal to "value"
        window.localStorage.removeItem("key");
        window.localStorage.setItem("key2", "value2");
        window.localStorage.clear();
        // localStorage is now empty
    }

    </script>
  </head>
  <body>
    <h1>Example</h1>
    <p>localStorage</p>
  </body>
</html>

Windows Phone 7 Quirks

Dot notation is not available on Windows Phone 7. Be sure to use setItem or getItem, rather than accessing keys directly from the storage object, such as window.localStorage.someKey.