Asymmetrik/mean2-starter

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

import * as _ from 'lodash';

@Pipe({name: 'area'})
export class AreaPipe implements PipeTransform {
    transform(metersSquaredDistance: number): string {
        if (null != metersSquaredDistance) {
            let areaKm = metersSquaredDistance / 1000000;
            if (areaKm >= 1000000) {
                return _.round(areaKm / 1000000).toLocaleString() + ' M km²';
            } else {
                return _.round(areaKm).toLocaleString() + ' km²';
            }
        }
        return '';
    }
}