Chaining Pipes in Angular

In this article we will learn about Chaining Pipes in Angular. Pipes can be chained together to make use of multiple pipes in one expression. Please read my previous article Parameterized Pipes in Angular.

The chaining Pipe is used to perform the multiple operations within the single expression. This chaining operation will be chained using the pipe (|).

Example-1

In the following example, to display the birthday in the upper case- will need to use the inbuilt date-pipe and upper-case-pipe.

export class AppComponent {

  birthday : Date= new Date();

}

<p> Unforamtted : {{ birthday }} </p>

<p> Formatted with use only one pipe : {{ birthday | date }} </p>

<p> Formatted with use chain pipe : {{ birthday | date | uppercase}} </p>

You can see on below, on the last row we can use chain pipes. We used both of the pipes date & uppercase that’s called chain pipes.

Example-2

export class AppComponent {
  name : string= '';
}

On below we use slicepipe and uppercase to display string in uppercase after slicing operation.

  <label for="usr">Pipe Test:</label>
  <input type="text" [(ngModel)]="name" class="form-control col-sm-6" id="usr">

  <br>
  <h5>Result with chaining:</h5>
  <p>{{name | slice:1:12 | uppercase}}</p>

On the above image you can see the it slice the letter one from first space and maximum characters 12 shows.

Conclusion

In this article we will learn about Chaining Pipes in Angular. Pipes can be chained together to make use of multiple pipes in one expression.

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