beginner pathway
Web App Builder Foundations
Learn the minimum HTML, React, API and testing concepts needed to build useful web tools.
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Semantic Interface Map
A good interface starts as a clear document: headings create structure, links navigate, forms collect input and repeated items share a predictable pattern. Visual polish matters more when the underlying semantics already work.
Exercise
Sketch the landmarks and headings for a page that teaches one skill.
Assessment
Why do headings matter beyond visual size?
Headings create document structure used by people, browsers and assistive technology.
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Component and State Thinking
Interactive apps are easier to reason about when data, state and rendering are separated. A component should know what it owns, what it receives, and what it reports back.
Exercise
Name the state variables needed for a question-answer form with loading and error states.
Assessment
What is one risk of storing the same truth in two places?
Duplicated state can drift and create confusing behavior.
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API Contracts and Tests
A public app should call a small application API, not private engineering tools. The API validates input, applies authorization, calls internal services if allowed, and returns a typed result that the UI can explain.
Exercise
Write the fields you would expect in a safe ask-answer response.
Assessment
Why should the browser not call private engineering endpoints directly?
A server API enforces validation, authorization and least privilege before private systems are touched.
Sources
Final mini-project
Build a static learning card plus a typed API contract for one local tool.