Angular 6. 是否可以按条件注入服务?

In my angular app (with the angular material) I have a filter panel and I want besides select to be able to make autocomplete (user input value and it sends to the back-end, whereby $regexp query we find the match in MongoDB collection). But to do it I need manually inject service into filters component. I didn't find any info on how to do it.I need something like this:if (filters.serviceName) { injector.inject(serviceName);}injector.get(serviceName).find(searchQuery);Is it possible? Thanks. 解决方案 Yes you can inject service dynamically using injector.get()Sample code :import { Component, Injector } from '@angular/core';import { MyService } from './my.service';@Component({ selector: 'my-app', templateUrl: './app.component.html', styleUrls: [ './app.component.css' ]})export class AppComponent { name = 'Angular'; myService : MyService; constructor(private injector : Injector){ if(true){ // some condition this.myService = injector.get<MyService>(MyService); } console.log(this.myService.prop1) }}Working demo 这篇关于Angular 6. 是否可以按条件注入服务?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！