How to Emit an EventEmitter from an NgbModal in Angular 12

Learn how to effectively emit an EventEmitter from an `NgbModal` in Angular 12, ensuring better communication within your components for more dynamic applications.
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Understanding the Problem: Emitting Events from an NgbModal

When building reusable components in Angular, especially with modal dialogs using NgbModal from the -ng-bootstrap/ng-bootstrap library, you may encounter challenges with event emission. If you're trying to have a modal emit events back to its parent component, it can be frustrating when it doesn't seem to work as intended.

In this guide, we'll walk you through a common issue faced by developers working with NgbModal. Specifically, we'll address how to successfully emit an event using Angular's EventEmitter from a modal component and capture it in the parent component.

The Setup: Understanding the Modal Component

Modal Component Structure

Below is a simplified version of a modal component that you'll be working with:

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

Parent Component Setup

In the parent component where the modal is triggered, you would initiate it like so:

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

Capturing the Event

To capture the emitted event, the HTML for the parent component would look something like this:

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

Here, onDelete(task) would fire whenever clickEvnt is emitted from the modal.

The Solution: How to Properly Emit Events from the NgbModal

Step-by-Step Instructions

Open the Modal Instance: When you open the modal, you need to ensure that you subscribe to the EventEmitter.

Subscribe to the EventEmitter: Modify your open method to include a subscription to the emitted event.

Here’s how you can do it:

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

Key Points to Remember

Always Subscribe: The failure to emit an event often stems from not subscribing to the EventEmitter in the modal instance.

EventEmitter: Use the -Output() decorator in the modal component to define the EventEmitter.

Parent Handling: Ensure that your parent component is correctly set up to handle the emitted event, utilizing the appropriate method.

Conclusion

By following the steps outlined above, you can successfully emit events from an NgbModal and capture them in your parent component. This adds powerful event-driven features to your Angular applications, allowing for better user interaction and component communication.

Don’t hesitate to ask any questions or share your experiences with modals and event emission in Angular! Happy coding!

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