How to fetch NODEJS web api data in Angular 15 using HttpClient?

Hello friends, welcome back to my blog. Today in this blog post, I am going to show you, How to fetch NODEJS web api data in Angular 15 using HttpClient?

Angular15 came and if you are new then you must check below link:

1. Angular15 Basic Tutorials

Friends now I proceed onwards and here is the working code snippet and please use carefully this to avoid the mistakes:

1. Firstly friends we need fresh angular 15 setup and for this we need to run below commands but if you already have angular 15 setup then you can avoid below commands. Secondly we should also have latest node version installed on our system:

npm install -g @angular/cli 

ng new angulardatatable //Create new Angular Project

cd angulardatatable // Go inside the Angular Project Folder

2. Now friends, here we need to run below commands into our project terminal to install datatable modules, bootstrap(for good looks), jquery  modules into our angular application:

I am also adding bootstrap to make datatable looks good.

npm install jquery --save

npm install datatables.net --save

npm install datatables.net-dt --save

npm install angular-datatables --save

npm install @types/jquery --save-dev

npm install @types/datatables.net --save-dev

npm install bootstrap --save

3. After done with commands add below code into you angular.json file:

...
"styles": [
              ...
              "node_modules/datatables.net-dt/css/jquery.dataTables.css",
              "node_modules/bootstrap/dist/css/bootstrap.min.css",
            ],
            "scripts": [
            "node_modules/jquery/dist/jquery.js",
            "node_modules/datatables.net/js/jquery.dataTables.js",
            "node_modules/bootstrap/dist/js/bootstrap.js",
            ]
...

4. Now friends we need to  add below code into your src/app/app.module.ts file:

...
import {DataTablesModule} from 'angular-datatables';
import { HttpClientModule } from '@angular/common/http';
...
imports: [
...
DataTablesModule,
HttpClientModule
]

5. Now friends we just need to add below code into src/app/app.component.ts file:

...
import { HttpClient } from '@angular/common/http';
export class AppComponent {
 ...
  data:any;
  constructor(private http: HttpClient){
  //here I am calling spring boot web api
  this.http.get('http://localhost:8080/api/books').subscribe(data => {
    this.data = data;

  setTimeout(()=>{   // here I am rendering web api data
    $('#datatableexample').DataTable( {
      pagingType: 'full_numbers',
      pageLength: 5,
      processing: true,
      lengthMenu : [5, 10, 25]
  } );
  }, 1);
        }, error => console.error(error));
}


}

6. Now friends we need to add below code into app.component.html file to get final output on web browser:

<table id="datatableexample" class="table table-striped table-bordered table-sm row-border hover" datatable [dtOptions]="dtOptions">
     <thead>
       <tr>
         <th>ID</th>
         <th>Title</th>
         
       </tr>
     </thead>
     <tbody>
      <tr *ngFor="let group of userdata">
            <td>{{group.id}}</td>
            <td>{{group.title}}</td> 
            

</td>
</tr>
</tbody>
</table>

7. Now friends, we need to create new folder name ‘nodeproject’ and inside it open new terminal and run below commands::

npm i express cors

8. Now friends, we need to create new file name ‘nodejs’ and add below code inside that file:

const express = require('express');
const app = express();
app.use(express.json());
const cors = require('cors')
const books = [
{title: 'Harry Potter', id: 1},
{title: 'Twilight', id: 2},
{title: 'Lorien Legacies', id: 3}
]
 
//READ Request Handlers
app.get('/', (req, res) => {
res.send('Welcome to therichpost REST API with Node.js Tutorial!!');
});
app.use(cors()); // it enables all cors requests
app.get('/api/books', (req,res)=> {
res.send(books);
});
 

//PORT ENVIRONMENT VARIABLE
const port = process.env.PORT || 8080;
app.listen(port, () => console.log(`Listening on port ${port}..`));

Now we are done friends and please run ng serve command and if you have any kind of query then please do comment below.

Note: Friends, I just tell the basic setup and things, you can change the code according to your requirements. For better understanding must watch video above.

I will appreciate that if you will tell your views for this post. Nothing matters if your views will be good or bad.

Jassa

Thanks