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

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Component tree

Component tree

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

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Component tree

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In this session, we'll explore the component tree of our Driving Theory Test quiz app. Understanding the structure helps us see how the UI and logic are organized and how data flows through the app. At the top, we have our main app component. This is the heart of the app. It uses UseReducer to manage all quiz state, like the current question, user answers, submission status, and the quiz timer. It also decides whether to show the quiz questions or the results view, depending on if the quiz is submitted. Within its return JSX, it renders a progress bar showing quiz progress. This is how our tree looks like now with the progress bar as a child of the App component. The AppBanner component displays the app's context. It is a child of the App component. Then we have the QuizContent area, which conditionally renders either the question view or the result view after submission. This is how our component tree looks like so far. When showing questions, Question View renders a card that…

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