If I'm calling this function, getting always html2canvas is not defined.

makeScreenshot: function(button)

{

    debugger;

    html2canvas(document.body, {

        Uncaught ReferenceError: html2canvas is not defined

        onrendered: function(canvas) {

            document.body.appendChild(canvas);

        }

    });

},

but why? I have a class of it... like in tutorial written about it. Does anyone have a solution?

I suppose I need to include html2canvas here, but I don't know how.

Ext.define(TEST.controller.Desktop, {

    extend: Ext.app.Controller,



    views: [

        desktop.Desktop,

        //desktop.TaskBar,

        desktop.Toolbar,

        desktop.DataprovidersDataView,

        configuration.UploadFileWindow

    ],



refs: [{

    ref: viewport,

    selector: viewport

}, {