Angular Define Global Variables Tutorial

By Hardik Savani | January 22, 2020 | Category : Angular

In this tutorial, we will learn how declare global variable in angular app. we will simple create global variables file in angular. we can create global variable for all components in angular application.

we can easily define global variable file in angular 6, angular 7, angular 8, angular 9, angular 10 and angular 11 application.

We always need to declare global variable file for our angular application because we can set some global variable there like site title, api url etc so you can easily access any where in our application easily.

So, in this example, we will create GlobalConstants file for adding global variables in our application. in that file i added two variables as apiURL and siteTitle. I will access those variable value in my AppComponent file. you can also access all the component as you want.

Now, bellow we will create GlobalConstants as like created bellow and We will use that variables as like used in AppComponent file.


export class GlobalConstants {

public static apiURL: string = "";

public static siteTitle: string = "This is example of";



import { Component, OnInit } from '@angular/core';

import{ GlobalConstants } from './common/global-constants';


selector: 'app-root',

templateUrl: './app.component.html',

styleUrls: ['./app.component.css']


export class AppComponent implements OnInit{

title = GlobalConstants.siteTitle;

constructor() {



ngOnInit() {




Now you can check this project and run it.

It will display as like bellow:


This is example of

Angular is running in the development mode. Call enableProdMode() to enable the production mode.


Live Reloading enabled.

I hope it can help you...

Hardik Savani
My name is Hardik Savani. I'm a full-stack developer, entrepreneur and owner of Aatman Infotech. I live in India and I love to write tutorials and tips that can help to other artisan. I am a big fan of PHP, Javascript, JQuery, Laravel, Codeigniter, VueJS, AngularJS and Bootstrap from the early stage.
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