import { Pipe, PipeTransform } from '@angular/core'; @Pipe({ name: 'min' }) export class MinPipe implements PipeTransform { transform(input: any): any { var values = Object.keys(input).map(function (e) { return input[e] }) return (Array.isArray(input) === true) ? Math.min.apply(Math, input) : Math.min(...values); } }