For readers who are new to Sencha but coming from a Flex background, this guest blog post provides useful context and reference to familiarize yourself with how Flex concepts map to Sencha concepts.
Typically, a Hello World program illustrates the quickest way to get anything (such as text) on the screen and publishing (or compiling) without errors. In this post, I have also added a few things. We see a Sencha component (Viewport), Sencha classpathing (src), a custom super class, a custom subclass, and an example of a mixin class (similar to multiple inheritance).
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