Angular2 How to transform year to age using pipe

Question

I want to create a pipe where it can transform year (1992) to age (26) (Korean Age)

I figure I should load current year (2017), subtract 1992 and add +1

but I am not sure how to make this happen with pipe.

I appreciate your help in advance.

Answer 1

Blockquote

Here is my example using moment.js (it also shows months along with years, feel free to remove it):

import { Pipe, PipeTransform } from '@angular/core';
import * as moment from 'moment';
@Pipe({
    name: 'age'
})
export class AgePipe implements PipeTransform {

    transform(value: Date): string {
        let today = moment();
                let birthdate = moment(value);
                let years = today.diff(birthdate, 'years');
                let html:string = years + " yr ";

                html += today.subtract(years, 'years').diff(birthdate, 'months') + " mo";

        return html;
    }

}

And then just use this pipe: {{person.birthday|age}} in your HTML, where person.birthday is Javascript Date object.