在运行时在angular应用程序中加载config.json文件

import { HttpClientModule } from '@angular/common/http';

@NgModule({
  imports: [
    HttpClientModule
  ],
  ...
})
export class AppModule { }

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Injectable({
  providedIn: 'root'
})
export class ConfigService {
  private configUrl = 'assets/config.json';

  constructor(private http: HttpClient) { }

  getConfig() {
    return this.http.get(this.configUrl);
  }
}

import { Component } from '@angular/core';
import { ConfigService } from './config.service';

@Component({
  selector: 'app-root',
  template: `
    <h1>{{ title }}</h1>
    <p>API Key: {{ apiKey }}</p>
  `
})
export class AppComponent {
  title: string;
  apiKey: string;

  constructor(private configService: ConfigService) {
    this.configService.getConfig().subscribe((config: any) => {
      this.title = config.title;
      this.apiKey = config.apiKey;
    });
  }
}