Question

I am trying to render a panel in extJS 3.4.0. It works well in Firefox but gives the following error when I try it in Chrome:

Uncaught TypeError: Cannot call method ‘applyStyles’ of null
Ext.Panel.Ext.extend.createElementext-all-debug.js:17057
Ext.Panel.Ext.extend.onRenderext-all-debug.js:17127
Ext.FormPanel.Ext.extend.onRenderext-all-debug.js:43353
Ext.extend.renderext-all-debug.js:10763
Ext.layout.ContainerLayout.Ext.extend.renderItemext-all-debug.js:13191
Ext.layout.AccordionLayout.Ext.extend.renderItemext-all-debug.js:14823
Ext.layout.ContainerLayout.Ext.extend.renderAllext-all-debug.js:13182
Ext.layout.ContainerLayout.Ext.extend.onLayoutext-all-debug.js:13168
Ext.layout.FitLayout.Ext.extend.onLayoutext-all-debug.js:13383
Ext.layout.ContainerLayout.Ext.extend.layoutext-all-debug.js:13162
Ext.layout.ContainerLayout.Ext.extend.runLayoutext-all-debug.js:13271
Ext.layout.ContainerLayout.Ext.extend.onResizeext-all-debug.js:13265
EXTUTIL.Event.fireext-all-debug.js:310
EXTUTIL.Observable.fireEventext-all-debug.js:54
Ext.Panel.Ext.extend.onBodyResizeext-all-debug.js:17670
Ext.Panel.Ext.extend.onResizeext-all-debug.js:17661
Ext.BoxComponent.Ext.extend.setSizeext-all-debug.js:12164
Ext.layout.FitLayout.Ext.extend.setItemSizeext-all-debug.js:13392
Ext.layout.FitLayout.Ext.extend.onLayoutext-all-debug.js:13385
Ext.layout.ContainerLayout.Ext.extend.layoutext-all-debug.js:13162
Ext.layout.CardLayout.Ext.extend.setActiveItemext-all-debug.js:13440
Ext.Container.Ext.extend.afterRenderext-all-debug.js:12738
Ext.Panel.Ext.extend.afterRenderext-all-debug.js:17414
Ext.extend.renderext-all-debug.js:10802
Ext.layout.BorderLayout.Ext.extend.onLayoutext-all-debug.js:13768
Ext.layout.ContainerLayout.Ext.extend.layoutext-all-debug.js:13162
Ext.Container.Ext.extend.doLayoutext-all-debug.js:12969
Ext.Container.Ext.extend.afterRenderext-all-debug.js:12743
Ext.extend.renderext-all-debug.js:10802
Ext.Componentext-all-debug.js:10641
Ext.apply.extend.sbext-base-debug.js:246
Ext.apply.extend.sbext-base-debug.js:246
Ext.apply.extend.sbext-base-debug.js:246 (anonymous
function)Ydee.js:27 EXTUTIL.Event.nameext-all-debug.js:190
callext-all-debug.js:1459

The code that I have used is:

var userDlg = new myDialog();

    var contentPanel = {
        id: 'content-panel',
        region: 'center',
        layout: 'card',
        margins: '2 5 5 0',
        activeItem: 0,
        border: false,
        items: userDlg
    };


    var viewport = new Ext.Viewport({
        layout: 'border',
        title: 'Ext Layout Browser',
        items: [contentPanel],
        renderTo: Ext.getBody()
    });

Can anyone point out the error?

Thanks in advance.

Answer 1

The problem was because I was rendering FormPanel inside Viewport instead of Panel.

Accordion layout wasn’t functioning in FormPanel. When I changed it to Panel, it started working.

I am not sure why firefox wasn’t complaining though.