PipeTransform
interface
An interface that is implemented by pipes in order to perform a transformation. Angular invokes the transform
method with the value of a binding as the first argument, and any parameters as the second argument in list form.
interface PipeTransform {
transform(value: any, ...args: any[]): any
}
Class implementations
Methods
transform() | ||||||
---|---|---|---|---|---|---|
|
value | any | |
args | any[] |
Returns
any
Usage notes
In the following example, RepeatPipe
repeats a given value a given number of times.
import {Pipe, PipeTransform} from '@angular/core';
@Pipe({name: 'repeat'})
export class RepeatPipe implements PipeTransform {
transform(value: any, times: number) {
return value.repeat(times);
}
}
Invoking {{ 'ok' | repeat:3 }}
in a template produces okokok
.
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Licensed under the Creative Commons Attribution License 4.0.
https://v8.angular.io/api/core/PipeTransform