Achieving Two-Way Binding in Angular Reactive Forms Without ngModel

Learn how to implement `two-way binding` in Angular Reactive Forms without using ngModel. This guide provides clear, actionable steps to fix common issues.
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This video is based on the question https://stackoverflow.com/q/67396374/ asked by the user 'Phenomenal' ( https://stackoverflow.com/u/15775358/ ) and on the answer https://stackoverflow.com/a/67397363/ provided by the user 'Tamil.S' ( https://stackoverflow.com/u/7485135/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Achieve Two-Way Binding in Angular Reactive Forms Without ngModel

Binding data in Angular applications is crucial for creating responsive user interfaces. One common question developers encounter is how to achieve two-way binding in Angular's Reactive Forms without utilizing ngModel. If you've faced issues with updating form values dynamically, you're in the right place.

The Problem

You might run into a situation where you've set up your Angular Reactive Forms but notice that when users hit enter after typing in an input field, the new values do not display in your UI. For instance, after adding hobbies like "Gardening" and "Painting," new entries don't reflect as expected.

Here’s a simplified scenario of the code you might be working with:

Template File

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

TypeScript File

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

The Solution

The main issue here is that the onAddHobby() method is adding an empty FormControl each time you hit enter. To fix this, you need to capture the input value being typed and pass it to the FormControl. Let’s break down the changes step-by-step.

1. Updating the Template

First, modify the template to capture the input value when the enter key is pressed. Here’s how you can do that:

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

Here, we pass $event.target.value to the onAddHobby method when the user hits enter.

2. Updating the TypeScript Function

Next, you need to update the onAddHobby function in your TypeScript file to accept the value:

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

Now, this function will create a new FormControl with the input value rather than leaving it empty.

Conclusion

By following these steps, you can effectively achieve two-way binding in Angular Reactive Forms without using ngModel. This approach allows for dynamic updates to your form controls based on user input, enhancing the user experience of your application.

If you have further questions or run into issues while implementing these changes, feel free to ask for help. Happy coding!

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