Why does extJS give me "Ext.Panel is not a constructor" error in Firebug? -

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i working through this extjs tutorial type in code firebug, press ctrl-enter , renders you, worked simple example got error:

instructions:

alt text

what happens:

alt text

what else need example work states in demo?

you need have ext-all.js (and maybe ext-base.js?) loaded in page you're testing work. example isn't working because panel file cannot located. doesn't exist because haven't added it.

test ext.panel code in firebug @ api site: http://dev.sencha.com/deploy/dev/docs/

you'll see desired behavior occurs because page has of proper js files loaded. time see message "... not constructor" should indication js file containing object has not been loaded page.


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