React Fundamentals

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Controlled vs Uncontrolled Components

Having learned what controlled and uncontrolled components are and their functionalities in forms, we'll now explore the scenarios that best suit each approach.

When to Use Controlled Components

These are the best-case scenarios for using controlled components in your forms:

  • You need to track the value of form elements in the component's state.
  • You want to perform real-time form validation or show error messages.
  • You need to integrate form data with other logic, such as submitting the form, conditional rendering, or using state elsewhere in the app.

When to Use Uncontrolled Components

These are the best-case scenarios for using uncontrolled components in your forms:

  • You have simple forms and don't need to track or manipulate the form data frequently.
  • You want a lightweight form without the overhead of managing state for each input.
  • You prioritize performance and need a form with many fields where React state would cause unnecessary re-renders.

Both controlled and uncontrolled components are useful in different scenarios. Controlled components offer more flexibility and predictability, making them ideal for complex forms that require validation or need to interact with other parts of your application.

On the other hand, uncontrolled components can simplify code and improve performance for simpler use cases, where form state management isn’t necessary.

By understanding the strengths and trade-offs of both approaches, you can make informed decisions about which method best suits your project’s needs.

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