React Essentials · Final Project · Lesson 24 of 26
Planning a React App
Concept
Planning a React App
Sketch your components as a tree before coding. Decide what state lives where and what data flows between them.
By the end of this lesson
- Explain the core idea behind Planning a React App.
- Predict output before running a change.
- Test one realistic and one unusual input.
- Use the result to make the next decision.
How to study this page
- 1. Read one concept.
- 2. Change the example.
- 3. Run, compare, and explain.
- 4. Complete the challenge below.
Self-check before continuing
Without looking at the example, describe what changes when you modify one input in Planning a React App. Then reopen the editor and prove your explanation with a small test.
You are ready to continue when you can predict, test, and explain the result.
Your turn
Draw the component tree, as comments, for a small app of your choice.
Need a nudge?
Ask about this lesson or your next move. The guide explains the path without taking the work away from you.
Ready for the next lesson?
Mark this lesson complete when you have finished the exercise.
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