Simple Angular 6 Observables Example

Today, We want to share with you Simple Angular 6 Observables Example.In this post we will show you Angular 6 Observables and Promises, hear for Creating an Observable with Angular 6 we will give you demo and example for implement.In this post, we will learn about Angular 6: Upgrading API calls to RxJS 6 with an example.

Simple Angular 6 Observables Example

There are the Following The simple About Simple Angular 6 Observables Example Full Information With Example and source code.

As I will cover this Post with live Working example to develop Angular 6 RxJS 6 Tutorial & Example, so the some major files and Directory structures for this example is following below.

  • Making an observable
  • 1: Setup Angular 6.
  • 2: MAke a JSON server.
  • 3: Get the data.
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Angular 6 Example

Angular Latest My Previous Post With Source code Read more…..

  1. Angular 6 Folder Project Structure
  2. Angular 6 CLI Installation
  3. Angular 6 Module File
  4. Angular 6 Components
  5. Angular 6 Services
  6. Angular 6 Routing
  7. Angular 6 CSS
  8. Angular 6 Class Binding
  9. Angular 6 Animation
  10. Angular 6 Templating
  11. Angular 6 HTTP Client

Angular 6 Making an observable

import { Observable } from 'rxjs';

// Make observable
const memberObservable = new Observable((observer) => {
    //Angular 6 observable execution
    observer.next('Hello Observable');
    observer.complete();
});

// subscribe Simple Angular 6 Observables Example
memberObservable.subscribe();

Simple Angular 6 Observables Example Tutorial

Step #1: Install Angular 6.

Angular CLI for Angular 6

npm install -g @angular/cli

// create a local angular-6 project
ng new observables

Step #2: Make an Angular 6 JSON server.


//Json in Angular 6 Observables Example Tutorial From Scratch
{
    "memberList": [
    {
        "id": "1",
        "name": "Jaydeep Gondaliya",
        "salary": "120265"
    },
    {
        "id": "2",
        "name": "Krunal Sisodiya",
        "salary": "18500"
    },
    {
        "id": "3",
        "name": "Ankit Kathiriya",
        "salary": "245850"
    },
    {
        "id": "4",
        "name": "Chirag dethariya",
        "salary": "358523"
    },
    {
        "id": "5",
        "name": "Dhaval dave",
        "salary": "252030"
    }]
}

Simple Angular 6 Observables Screen Shot

start the JSON server in Angular 6 – Screen Shot

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Angular 6 Observables Example Tutorial - Simple Angular 6 Observables Example
Angular-6-Observables-Example-Tutorial

Step #3: Get the data.

LMember.ts

// LMember.ys

export interface LMember {
    id: Number;
    name: String;
    salary: Number;
}

Make a service file using angular-6

ng g s member --spec=false

member.service.ts

// member.service.ts

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { map } from 'rxjs/operators';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class MemberService {

  constructor(private http: HttpClient) { }

  protected url = 'http://localhost:4000';

  getMembers(): Observable {
    return this
            .http
            .get(`${this.url}/memberList`)
            .pipe(
              map(res => res)
          );
      }
}

app.component.ts

// app.component.ts

import { Component, OnInit } from '@angular/core';
import { MemberService } from './member.service';
import { LMember } from './LMember';
import { Observable } from 'rxjs';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {

  protected title = 'app';
  protected members$: Observable;

  constructor(public memberservice: MemberService) {}

  ngOnInit() {
    this.memberservice.getMembers().subscribe(res => {
      this.members$ = res;
    });
  }
}

Angular 6 HTML Interface

The members$ observable

<p>Simple Angular 6 Observables Example</p>
<table>
  <thead>
    <tr>
      <th>ID</th>
      <th>Member Name</th>
      <th>Member Salary</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>{{ member.id }}</td>
      <td>{{ member.name }}</td>
      <td>{{ member.salary }}</td>
    </tr>
  </tbody>
</table>

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