Formatting numbers within the ngModel directive

How can I properly format a number using ngModel? When I attempted to do it like this

<input type="number" [(ngModel)]="name.name.price | number:'1.2-3'">
, it resulted in an error. What steps should I take to fix this issue?

Answer №1

When working in Angular, remember that [()] represents two-way binding.

  • The square brackets [] denote one-way attribute binding, connecting data from the component to the view. This is where real-time data transformations occur, facilitated by pipes.
  • On the other hand, parentheses () signify one-way event binding, allowing data flow from the view to the component. It's important to note that pipe functions do not operate within this context.

It's crucial to distinguish between [] and (), utilizing pipes exclusively within the square brackets. Here's an example of how to structure your code:

<input type="number" [ngModel]="name.name.price | number:'1.2-3'">

Answer №2

Why not give it a shot? Replace the [(ngModel)] syntax with [ngModel] and see if it works.

<input type="number" [ngModel]="name.name.price | number:'1.2-3'">

Please be aware: switching to [ngModel] will result in the ngModel value being treated as a string instead of a number.

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