What Is ExtJS ExtJS 4+ Extensions Examples Tutorials

16Jan/150

How to “sencha package build” a “code” package

You can follow Sencha's guide all you want, but you won't be able to build a stand alone "code" package due to errors like:

com.sencha.exceptions.ExNotFound: Unknown definition for dependency : Ext.Component

To fix this, you need to add the following to your package's .sencha/app/sencha.cfg

package.framework=ext

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13Jan/150

Debugging ExtJS “Layout Run Error”

Recently I had to fix a lot of "[E] Layout run error" errors in an ExtJS 4.2.0 app. While I like to think I know ExtJS layouts fairly well and consider them one of the best parts of ExtJS, this experience has shown me a "darker" side of ExtJS layouts. When you're dealing with many (10+) layers of Containers, it seems there exist many unpredictable combinations of layouts that will result in "[E] Layout run error" in console, sometimes with functional implications, and other times without. Sometimes the smallest things can cause this error; i.e. I had a configuration setting on a Container:

style: { height: '54px' }

...and while everything looked and functioned correctly, a "layout run error" was being logged; changing the configuration to an explicit height solved the issue:

height: 54

The following 2-step approach has worked for me in systematically resolving numerous of these layout run errors:

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