Скачать или смотреть How to Use Vue $emit for Multiple Parent Components

Learn how to effectively utilize Vue's `$emit` for communication between a child component and multiple parents in your application, ensuring a seamless user experience.
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This video is based on the question https://stackoverflow.com/q/70436222/ asked by the user 'Tichel' ( https://stackoverflow.com/u/6277052/ ) and on the answer https://stackoverflow.com/a/70437712/ provided by the user 'Shaya Ulman' ( https://stackoverflow.com/u/10679649/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Use Vue $emit for Multiple Parent Components

When working with Vue.js, one common challenge developers face is the need for a child component to communicate with multiple parent components. This often occurs in scenarios where interchangeable UI elements share the same functionality—like a signup form for both clients and companies.

In this guide, we'll explore a solution to effectively use the $emit method in Vue.js for handling interactions between a child component and multiple parent components.

The Scenario: Signup Forms

Imagine you have two signup forms:

A signup form for clients.

A signup form for companies.

Both forms require the same process:

Verifying a telephone number.

Receiving an SMS.

Validating the telephone number.

In the structure of your application, both forms use a child component dedicated to telephone number verification.

Here's a brief snippet of how this is structured in your Vue components:

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

Upon validating the telephone number, the child component should trigger the opening of either the client or companies' specific forms through $emit. However, ensuring that it works for both parent components can be challenging.

The Solution: Emitting Events to the Root

A straightforward approach to tackle this issue is to emit your events to the Vue root instance. This way, both parent components can listen for the event and react accordingly.

Step 1: Emit to the Root in the Child Component

In your child component (e.g., Verify-telephone.vue), instead of emitting to a specific parent, you can emit to the root:

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

Step 2: Set Up Listeners in Both Parent Components

Next, in each parent component where you want to handle the emitted event, you need to set up a listener during the created lifecycle hook. Here’s how you can do it:

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

Step 3: Implement the Toggle Method

Ensure you have a toggle method implemented in your parent component that will handle the emitted event properly:

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

Conclusion

By emitting the toggle event to the $root, both parent components can seamlessly react to changes initiated in the child component. This approach not only keeps your components decoupled but also ensures multiple parents can respond to a single child action efficiently.

Using Vue's $emit function in this way allows for greater flexibility and less coupling in your Vue.js applications.

Feel free to adapt this method according to your specific use cases and enjoy a smoother experience in your Vue components!