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

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Review of controlled vs. uncontrolled inputs

Review of controlled vs. uncontrolled inputs

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

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Review of controlled vs. uncontrolled inputs

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In this session, we're going to review quickly a comparison of controlled and uncontrolled inputs in React, which are two different ways to handle form data. Let's start with controlled components. A controlled component is basically a form input, like an input field, text area or select, where React takes over managing its value. Instead of the browser's DOM keeping track of what's inside the input, we connect the input directly to React State. Here's the key idea. The input's value is always tied to some piece of state. And whenever a user types something, the onChange event updates that state. This way, React always knows exactly what's inside the input. Since React is in control of the data, it makes validation, transformations, and form handling much more reliable compared to letting the DOM manage it. Now let's look at uncontrolled components. Unlike controlled components, uncontrolled components let the DOM manage the input's value instead of tying it to React's state. We use a…

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