Key question
How do I build a useful web application?
Check your understanding
Find an example, an application and a limit. Explain the concept without using its name, then compare your explanation with a primary source.
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Claims to examine
A useful web interface must preserve meaning, interaction and feedback across devices and input methods.
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How do I build a useful web application?
Follow the request from URL to accessible interface, then add state, forms, persistence and deployment.