Скачать или смотреть How to Use an @Output() Property Inline in Angular Without a Controller Function

Learn how to directly utilize an `@Output()` property within Angular without the need for a controller function. This guide offers a comprehensive solution for developers looking to streamline their component interactions.
---
This video is based on the question https://stackoverflow.com/q/71325973/ asked by the user 'pinale' ( https://stackoverflow.com/u/1820422/ ) and on the answer https://stackoverflow.com/a/71326022/ provided by the user 'Trash Can' ( https://stackoverflow.com/u/4383512/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: how to use an @Output() property inline without use a function into the controller

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Use an @Output() Property Inline in Angular Without a Controller Function

When working with Angular, developers often encounter scenarios where they want to use properties directly in their templates. One common need is to utilize an @Output() property inline, without resorting to calling a controller function. This guide will explain how you can achieve this efficiently and effectively.

The Problem Explained

Imagine you have a component that emits an event, and you're listening to that event from a parent component. Typically, you'd handle the emitted value by calling a function in the parent component that updates a variable. For instance, suppose we have a countRitiri output property that should update the label of a material tab. The usual setup looks like below:

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

Here, you define a function updateCountRitiri in your controller which updates the countRitiri variable. But what if you want to eliminate this function and update the countRitiri value directly inline?

The Solution: Using Inline Updates

To accomplish this, you can leverage Angular's ability to directly bind properties in your templates. If the countRitiri variable is not declared as private or protected, you can update it directly in the template like so:

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

This approach allows you to seamlessly bind the emitted value ($event) from the ant-ritiri-compact component directly to the countRitiri variable in the parent component, thus updating the label without needing to call an auxiliary function.

Key Considerations

Visibility of Variable: Ensure that countRitiri is accessible in your template by keeping it public or default (i.e., neither private nor protected).

Performance: Direct variable binding is usually efficient but be cautious with complex bindings that might result in performance overhead.

Conclusion

Using @Output() properties directly inline in Angular components can lead to cleaner and more maintainable code. By allowing your components to interact with each other in a more straightforward manner, you enhance the overall readability and usability of your application. Consider implementing this approach in your next Angular project to reduce the number of unnecessary functions and improve your component's efficiency.

By following the steps discussed in this post, you can effectively manage component data bindings without the clutter of additional functions, making your Angular applications more robust and easier to manage.