Last connected time pipe for angular

last-connected-time.pipe.ts

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

@Pipe({ name: 'lastConnectedFormat' })
export class LastConnectedTimeFormatPipe implements PipeTransform {
    transform(connectedTime: Date, ...args): string {
        let elapsed = new Date(new Date().getTime() - connectedTime.getTime()).getTime() / 60000;

        let time: string = '';

        if (elapsed < 60) {
            time = 'minutes ago';
        } else if ((elapsed /= 60) < 24) {
            time = 'hours ago';
        } else if ((elapsed /= 24) < 30) {
            time = 'days ago';
        } else return 'no connect';

        return Math.round(elapsed) + time;
    }
}