How to Display Data from Json File in Angular step by step

📁Angular | 📅 February 5, 2024

Displaying data from a JSON file in an Angular application involves several steps. Below is a step-by-step guide to help you achieve this:

Step 1: Set Up Angular Project

If you don’t have Angular CLI installed, install it using the following command:

npm install -g @angular/cli

Create a new Angular project:

ng new your-project-name
cd your-project-name

Step 2: Create JSON File

Create a JSON file (e.g., data.json) with some sample data. Place it in the “src/assets” folder.

// data.json
[
  {
    "id": 1,
    "name": "Item 1",
    "description": "Description for Item 1"
  },
  {
    "id": 2,
    "name": "Item 2",
    "description": "Description for Item 2"
  },
  // Add more items as needed
]

Step 3: Create Angular Service

Create an Angular service to fetch data from the JSON file. Generate a service using the Angular CLI:

ng generate service data

Modify the service file (‘src/app/data.service.ts’) to read the JSON file:

// data.service.ts
import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class DataService {
  private dataUrl = 'assets/data.json';

  constructor(private http: HttpClient) {}

  getData(): Observable {
    return this.http.get(this.dataUrl);
  }
}

Step 4: Fetch and Display Data in a Component

Generate a component using the Angular CLI:

ng generate component data-display

Edit the component file (‘src/app/data-display/data-display.component.ts’) to fetch and display the data:

// data-display.component.ts
import { Component, OnInit } from '@angular/core';
import { DataService } from '../data.service';

@Component({
  selector: 'app-data-display',
  templateUrl: './data-display.component.html',
  styleUrls: ['./data-display.component.css']
})
export class DataDisplayComponent implements OnInit {
  data: any[];

  constructor(private dataService: DataService) {}

  ngOnInit(): void {
    this.dataService.getData().subscribe(data => {
      this.data = data;
    });
  }
}

Step 5: Display Data in the Component Template

Edit the component template file (src/app/data-display/data-display.component.html) to display the fetched data:



  {{ item.name }}
  {{ item.description }}

Step 6: Integrate Component in App Module

Finally, integrate the newly created component in the app.module.ts file:

// app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { HttpClientModule } from '@angular/common/http';
import { DataDisplayComponent } from './data-display/data-display.component';

@NgModule({
  declarations: [
    DataDisplayComponent,
    // ... other components
  ],
  imports: [
    BrowserModule,
    HttpClientModule,
  ],
  providers: [],
  bootstrap: [DataDisplayComponent] // Set the component you want to display
})
export class AppModule { }