docs/source/LocalStorageProvider.html

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  18   <pre class="prettyprint lang-js">Ext.define('Ext.state.LocalStorageProvider', {
  19     /* Begin Definitions */
  20
  21     extend: 'Ext.state.Provider',
  22
  23     alias: 'state.localstorage',
  24
  25     /* End Definitions */
  26
  27     constructor: function(){
  28         var me = this;
  29         me.callParent(arguments);
  30         me.store = me.getStorageObject();
  31         me.state = me.readLocalStorage();
  32     },
  33
  34     readLocalStorage: function(){
  35         var store = this.store,
  36             i = 0,
  37             len = store.length,
  38             prefix = this.prefix,
  39             prefixLen = prefix.length,
  40             data = {},
  41             key;
  42
  43         for (; i &lt; len; ++i) {
  44             key = store.key(i);
  45             if (key.substring(0, prefixLen) == prefix) {
  46                 data[key.substr(prefixLen)] = this.decodeValue(store.getItem(key));
  47             }
  48         }
  49         return data;
  50     },
  51
  52     set : function(name, value){
  53         var me = this;
  54
  55         me.clear(name);
  56         if (typeof value == &quot;undefined&quot; || value === null) {
  57             return;
  58         }
  59         me.store.setItem(me.prefix + name, me.encodeValue(value));
  60         me.callParent(arguments);
  61     },
  62
  63     // private
  64     clear : function(name){
  65         this.store.removeItem(this.prefix + name);
  66         this.callParent(arguments);
  67     },
  68
  69     getStorageObject: function(){
  70         try {
  71             var supports = 'localStorage' in window &amp;&amp; window['localStorage'] !== null;
  72             if (supports) {
  73                 return window.localStorage;
  74             }
  75         } catch (e) {
  76             return false;
  77         }
  78         //&lt;debug&gt;
  79         Ext.Error.raise('LocalStorage is not supported by the current browser');
  80         //&lt;/debug&gt;
  81     }
  82 });
  83 </pre>
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