From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

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Build a useEffect that transforms the API data when data changes

Build a useEffect that transforms the API data when data changes

From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

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Build a useEffect that transforms the API data when data changes

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In this session, we'll enhance our React Weather app by implementing a UseEffect hook that dynamically transforms the data received from the OpenMedio API. This UseEffect will watch for changes in the data state and then extract and transform the current weather, daily, and hourly data into separate state variables for easier use in our components. This will make our app more efficient and our code cleaner. Now I am adding a new useEffect hook after the one fetching the data. This useEffect will be responsible for transforming our raw API data. I am changing the dependency array of our new useEffect to data. Now this useEffect will rerun whenever the data state variable changes. Let's add a return condition inside the useEffect. This is crucial to avoid errors. This checks if data exists and has a location property. If either is false, the use effect exits early, preventing access to potentially undefined properties. I am destructuring the data object inside the use effect to access…

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