This post helps us to learn “Declare and Access a
Global Variable in Angular 2” using “Typescript” and also share the steps to
create and use of this global variables.
Steps
–
1.
Create Global Variables.
2.
Import and Use the Global Variables
in the Component.
3.
Result
Create
Global Variables :- “app.global.ts”
import { Injectable } from '@angular/core';
@Injectable()
export class AppGlobals {
readonly baseAppUrl: string = 'http://localhost:57431/';
readonly baseAPIUrl: string = 'https://api.github.com/';
}
Import
and Use the Global Variables in the Component:- “user.component.ts”
import { Component, Injectable} from '@angular/core';
import { CommonModule } from '@angular/common';
import { HttpModule, Http } from '@angular/http';
import { UserService } from '../service/user.service';
import { AppGlobals } from '../shared/app.globals';
@Component({
selector: 'user',
templateUrl: './user.component.html',
styleUrls: ['./user.component.css'],
providers:
[UserService, AppGlobals]
})
export class UserComponent {
//USERS
DECLARATIONS.
users = [];
//HOME
COMPONENT CONSTRUCTOR
constructor(private
userService: UserService, private _global: AppGlobals) { }
//GET USERS
SERVICE ON PAGE LOAD.
ngOnInit() {
this.userService.getAPIUsers(this._global.baseAPIUrl + 'users/hadley/orgs').subscribe(data
=> this.users = data);
this.userService.getAppUsers(this._global.baseAppUrl + 'api/User/GetUsers').subscribe(data
=> console.log(data));
}
}
//END BEGIN – USERCOMPONENT
“user.server.ts”
:-
import { Injectable, InjectionToken } from '@angular/core';
import { Http, Response } from '@angular/http';
import 'rxjs/add/operator/map';
//BEGIN-REGION
- USERSERVICE
@Injectable()
export class UserService {
constructor(private _http:
Http) {
}
getAPIUsers(apiUrl) {
return this._http.get(apiUrl).map((data:
Response) => data.json());
}
getAppUsers(apiUrl) {
return this._http.get(apiUrl).map((data:
Response) => data);
}
}
//END BEGIN – USERSERVICE
Result:-
