Sencha Touch Ext.js Codes in Html Page <p>How to use ext codes in html pages ? </p> <p>Defined this :</p> <pre><code> var Ext = Ext || {}; var msg=new Ext.Msg(); Ext.Msg.alert("Something","Something"); </code></pre> <p>but Ext.Msg.alert doesnt work , throwing " undefined is not a function " error in console.</p>