Angular2 or TypeScript Left padding a String with Zeros

Question

I have a number let say 9. But I need it as String \"09\".

I know i can write my own logic. But I am looking for a implicit util function which can pad it.

I

Answer 1

You can create a Pipe for that

{{ID |LeftPadFilter: ID}}



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

@Pipe({
    name: 'LeftPadFilter',
    pure: false
})
export class LeftPadFilter implements PipeTransform {
    transform(item: string): string {
        return (String('0').repeat(2) + item).substr((2 * -1), 2);
    }
}