import { Pipe, PipeTransform, ReflectiveInjector } from '@angular/core'; import { Filters } from '../service/filters'; @Pipe({ name: 'addstar' }) export class AddstarPipe implements PipeTransform { filters constructor( filters:Filters){ this.filters = filters; } /** * @ input 要过滤的输入 */ transform = (input,prefix,count,suffix): any => { return this.filters.addStar(input,prefix,count,suffix); } }