(change) vs (ngModelChange) in angular

(change) vs (ngModelChange) in Angular: What's the difference?

🔀💻

Angular 1 only accepts the ng-change() event, but in Angular 2, developers have the option to use either (change) or (ngModelChange) events. But wait, aren't they the same thing? Let's dive in and find out! 💡

Understanding (ngModelChange)

First, let's take a look at the (ngModelChange) event. This event is triggered whenever there is a change in the input value. It is specifically designed to work with Angular's two-way data binding using the [(ngModel)] syntax.

Here's an example where (ngModelChange) event is used:

<input type="text" pInputText class="ui-widget ui-text" 
    (ngModelChange)="clearFilter()" placeholder="Find"/>

In this example, the clearFilter() function will be called whenever the input value changes. This is useful when you want to perform some action immediately after the user changes the input.

The Power of (change)

Now, let's shift our focus to the (change) event. This event is more generic and is not tied to Angular's two-way data binding. It is a standard HTML event that is triggered whenever the input value changes.

Here's an example where (change) event is used:

<input type="text" pInputText class="ui-widget ui-text" 
    (change)="clearFilter()" placeholder="Find"/>

Similar to (ngModelChange), the clearFilter() function will be called whenever the input value changes. The main difference is that (change) event can work with any input element, not just those with two-way data binding.

So, Which One is Best for Performance?

Now that we understand the difference between (ngModelChange) and (change), you might be wondering which one is best for performance. The truth is, they are both equally performant.

The performance impact of using either event is negligible and won't be noticeable in most scenarios. Therefore, the choice between (ngModelChange) and (change) should be based on your specific use case and requirements.

💡 Pro Tip: If you are using Angular's two-way data binding with [(ngModel)], it's recommended to use (ngModelChange) to maintain consistency and improve code readability. Otherwise, if you are working with standard HTML elements or have different requirements, feel free to use (change).

Your Turn!

Now that you understand the difference between (ngModelChange) and (change), it's time to put your knowledge into practice! Choose the event that best fits your needs and start building awesome Angular applications.

Got any questions or suggestions? Leave a comment below and let's engage in a discussion! 💬📣

✨ Happy coding! ✨