custom pipe that truncates a long string to a certain number of chars; uses lodash

truncate-angular2.js

// pipes/truncate.pipe.ts
import { Pipe, PipeTransform } from '@angular/core';
import * as _ from 'lodash';

@Pipe({ name: 'truncate' })
export class TruncatePipe implements PipeTransform {
	transform(value: string, chars?: number): string {
		let length = chars ? chars : 100;
		return _.truncate(value, {length: length });
	}
}

// app.module.ts
import { TruncatePipe } from './pipes/truncate.pipe';
@NgModule({
  declarations: [TruncatePipe]
})
 
// my.component.html
<span>{{myObject.description | truncate:50 }}</span>