I want to render 'viewport' to an element on my page,how can do it?

[zoluro]

I want to render 'viewport' to an element on my page,how can do it?
In fact, i found that the config(renderTo:'div1') do not work.It always render to body,why?
Thanks

[Erikvip]

You can't, a Viewport represents the entire visible area in the browser, and it always attaches itself to document.body.

See the docs on the viewport renderTo config:
http://docs.sencha.com/ext-js/4-0/#!/api/Ext.container.Viewport-cfg-renderTo

renderTo : String/HTMLElement/Ext.Element
Not applicable. Always renders to document body.

It sounds like what you're after is the layout option, or a different layout manager. Take a look at the layouts example:

http://dev.sencha.com/deploy/ext-4.0...t-browser.html

[zoluro]

All right ,Thanks!