将端点值从服务器配置传递到Angular 9应用程序

{
  "apiUrl": "https://api.example.com",
  "apiKey": "your-api-key"
}

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

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

  constructor(private http: HttpClient) {}

  loadConfig(): Promise<any> {
    return this.http.get(this.configUrl).toPromise()
      .then((config: any) => {
        this.config = config;
      });
  }

  getApiUrl(): string {
    return this.config.apiUrl;
  }

  getApiKey(): string {
    return this.config.apiKey;
  }
}

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

@Component({
  selector: 'app-home',
  template: `
    <h1>Welcome to My App</h1>
    <p>API URL: {{ apiUrl }}</p>
    <p>API Key: {{ apiKey }}</p>
  `
})
export class HomeComponent implements OnInit {
  apiUrl: string;
  apiKey: string;

  constructor(private configService: ConfigService) {}

  ngOnInit() {
    this.apiUrl = this.configService.getApiUrl();
    this.apiKey = this.configService.getApiKey();
  }
}

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { HttpClientModule } from '@angular/common/http';

import { AppComponent } from './app.component';
import { HomeComponent } from './home.component';
import { ConfigService } from './config.service';

@NgModule({
  declarations: [AppComponent, HomeComponent],
  imports: [BrowserModule, HttpClientModule],
  providers: [ConfigService],
  bootstrap: [AppComponent]
})
export class AppModule {
  constructor(private configService: ConfigService) {
    this.configService.loadConfig();
  }
}