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Load Json From Local File With Http Get In Angular 2

When you're developing web applications with Angular 2, one common task you might encounter is loading a JSON file from your local system using an HTTP GET request. This process might seem a bit tricky at first, but fear not, as I'll guide you through the steps on how to accomplish this seamlessly.

First and foremost, make sure you have Angular 2 set up in your project. You'll need the HttpClientModule module to make HTTP requests, so ensure it's imported in your app module.

Next, create a service in Angular to handle the HTTP GET request. This service will be responsible for fetching the JSON file from your local system. Start by generating a new service using the Angular CLI command `ng generate service data` (you can replace 'data' with your preferred service name).

In the generated service file, import the necessary modules:

Typescript

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

Now, define a method in the service to make the HTTP GET request to load the JSON file. Here's an example:

Typescript

@Injectable()
export class DataService {
  constructor(private http: HttpClient) {}

  getData() {
    return this.http.get('assets/data.json');
  }
}

In the above code snippet, we're using the HttpClient module provided by Angular to make a GET request to fetch the data.json file located in the assets folder of your project. Adjust the path as necessary to reflect the location of your JSON file.

After setting up the service, you need to make use of this service in your component. Inject the DataService into your component and call the `getData` method to load the JSON data. Here's an example of how you can achieve this:

Typescript

import { Component } from "@angular/core";
import { DataService } from "./data.service";

@Component({
  selector: "app-root",
  templateUrl: "./app.component.html",
  styleUrls: ["./app.component.css"]
})
export class AppComponent {
  jsonData: any;

  constructor(private dataService: DataService) {}

  ngOnInit() {
    this.dataService.getData().subscribe((data) => {
      this.jsonData = data;
      console.log(this.jsonData);
    });
  }
}

In the above component code snippet, we're subscribing to the observable returned by the `getData` method in the DataService. Once the data is fetched successfully, we store it in the `jsonData` property of the component.

Don't forget to include the HttpClientModule in your app module and add the necessary imports. With these steps in place, you should now be able to load a JSON file from your local system using an HTTP GET request in Angular 2 seamlessly. Happy coding!

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