chapter.checkpoint
State and Events
Pause here and make sure the main ideas feel clear before moving to the next chapter.
Review recommended
What you should understand now
Make components respond to user actions and remember changing values.
useState basics
Store a value that can change over time.
Handling clicks
Run code when a user clicks.
Form input state
Read and update typed values.
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Before you move on
Use this quick review if anything still feels unclear.
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Complete the lessons, pass the exercises, and pass the quiz to unlock the next chapter.