What Is Angular Pure Pipe?

What Is Pure Pipe?

Angular executes a pure pipe only when it detects a pure change to the input value. A pure change can be primitive or non-primitive.

Primitive data are only single values, they have not special capabilities and the non-primitive data types are used to store the group of values.

@Pipe({

  name: 'currency'

})

OR

@Pipe({

  name: 'currency',

  pure: true

})

And another example for a pure pipe –

import { Pipe, PipeTransform } from '@angular/core';

@Pipe({

  name: 'currency'

})

export class CurrencyPipe implements PipeTransform {

  transform(value: any, args?: any): any {

    if (!value) {

      return '1.00';

    }

    return value;

  }

}

For more detail kindly refer the - https://www.code-sample.com/2018/05/angular-5-6-7-pipes-decorator.html