63 lines
1.4 KiB
Markdown
63 lines
1.4 KiB
Markdown
# Step 4: Connect to API
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Real-world applications don’t live in isolation — they need APIs to talk to. Let's sketch something out!
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**Open `apps/todos/src/app/app.module.ts` to import `HttpClientModule`.**
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```typescript
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import { BrowserModule } from '@angular/platform-browser';
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import { NgModule } from '@angular/core';
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import { AppComponent } from './app.component';
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import { HttpClientModule } from '@angular/common/http';
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@NgModule({
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declarations: [AppComponent],
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imports: [BrowserModule, HttpClientModule],
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providers: [],
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bootstrap: [AppComponent]
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})
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export class AppModule {}
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```
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**Now, use `HttpClient` in the component to get the data from the api.**
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```typescript
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import { Component } from '@angular/core';
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import { HttpClient } from '@angular/common/http';
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interface Todo {
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title: string;
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}
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@Component({
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selector: 'myorg-root',
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templateUrl: './app.component.html',
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styleUrls: ['./app.component.css']
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})
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export class AppComponent {
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todos: Todo[] = [];
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constructor(private http: HttpClient) {
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this.fetch();
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}
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fetch() {
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this.http.get<Todo[]>('/api/todos').subscribe(t => (this.todos = t));
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}
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addTodo() {
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this.http.post('/api/addTodo', {}).subscribe(() => {
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this.fetch();
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});
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}
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}
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```
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!!!!!
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Run "ng serve todos" and open localhost:4200. What do you see?
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!!!!!
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"the server responded with a status of 404 (Not Found)" in Console.
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Blank screen.
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Exception rendered on the screen.
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