Learn React

Understand the unidirectional data flow model of React applications, props pass-downs, and local component states.

• Declare local component states using the useState hook.
• Pass variables and event callbacks downwards to child elements via read-only props.
• Optimize state locations by lifting state up when sibling components require shared access.

Learn how to synchronize components with external resources, fetch server data, and audit mounting hooks.

• Utilize the useEffect hook with dependency arrays to control execution cycles.
• Clean up listener subscriptions and timeouts in return callbacks to prevent memory leaks.
• Avoid infinite rendering loops by managing state mutation triggers properly.