Скачать или смотреть How to Call a Parent Method in a Child Component using React Hooks and ForwardRef

Learn how to correctly call a parent method from a child component in React using React Hooks and the ForwardRef concept.
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Calling a Parent Method from a Child Component in React

In React development, there are often situations where you'd like a child component to interact with its parent component's methods. This is a common challenge, especially when using hooks like useRef and concepts like forwardRef. In this post, we'll break down how to properly handle this scenario.

The Problem

You may start by trying to pass a reference from a parent to a child component, intending to call a method in the parent from the child. Below is an example where this approach seems to fail:

[[See Video to Reveal this Text or Code Snippet]]

In this code snippet, the issue lies in how the reference is being used and how you're trying to call the parent's method from the child component.

What Went Wrong:

The reference to buttonRef was passed incorrectly using ref="buttonRef". In function components, you should pass a reference using ref={buttonRef} instead.

Additionally, using refs to call parent methods is not necessary and can lead to unnecessary complexity.

The Solution

Instead of attempting to use refs for invoking parent methods, a more efficient and clearer approach is to pass the parent's method as a prop to the child component. This way, the child can call this method directly without needing a ref.

Step-By-Step Implementation

Define the Parent Component:

Start by defining your parent component, and pass the method you want to invoke as a prop to the child component.

[[See Video to Reveal this Text or Code Snippet]]

Define the Child Component:

In the child component, access the parent's method through the props. You'll call this method when a certain action occurs (like a button click).

[[See Video to Reveal this Text or Code Snippet]]

Final Code Example

Here's how the complete code looks after making the necessary adjustments:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By passing functions as props from parent to child in React, we can easily create interaction between components without the complexity that comes with using refs. This not only keeps the code tidy but also enhances readability and maintainability.

Whether you're new to React or familiar with hooks, understanding how to manage communication between components is essential in building robust applications.

Feel free to experiment with the example above and see how different changes affect the application. Happy coding!