Google map integration using google api in angular 11/12 app tutorial. In this example, you will learn how to integrate google maps in Your Angular 11/12 Application using this example. In this angular google maps integration tutorial, we would love to share each things step by step with example.
Angular 11/12 Google Maps Example Tutorial
First, let’s add a placeholder for Google Map in this angular application example.
Create New App
Execute the following command on terminal to create your angular 11 app using bellow command:
ng new myNewApp
Then Open app.component.html file and put the below html markup
<div class="row mt-5">
<div class="col-md-9 mx-auto">
<h2 class="text-left">Google Map</h2>
<div class="card mt-3">
<div class="card-body">
<div #mapRef style="width:100%;height:400px"></div>
</div>
</div>
</div>
</div>
Next, Open the app.component.ts file and add the below code:
@ViewChild('mapRef', {static: true }) mapElement: ElementRef;
Access <div #mapRef>: mapElement is a reference to <div #mapRef> inside app.component.html file. ViewChild directive creates a direct link between <div> element and a mapElement member variable.
Next, Loading the Maps JavaScript API
We are going to load the Maps JavaScript API in the app.module.ts file. If you don’t want to load it globally. You can create a new component and load it.
So, open the app.component.ts file and put the below two methods on this
renderMap() {
window['initMap'] = () => {
this.loadMap();
}
if(!window.document.getElementById('google-map-script')) {
var s = window.document.createElement("script");
s.id = "google-map-script";
s.type = "text/javascript";
s.src = "https://maps.googleapis.com/maps/api/js?key=AIzaSyDRmqZ-1VD-DbsccElMGtMtlRz9FndbPB4&callback=initMap";
window.document.body.appendChild(s);
} else {
this.loadMap();
}
}
loadMap = () => {
var map = new window['google'].maps.Map(this.mapElement.nativeElement, {
center: {lat: 24.5373, lng: 81.3042},
zoom: 8
});
var marker = new window['google'].maps.Marker({
position: {lat: 24.5373, lng: 81.3042},
map: map,
title: 'Hello World!',
draggable: true,
animation: window['google'].maps.Animation.DROP,
});
var contentString = '<div id="content">'+
'<div id="siteNotice">'+
'</div>'+
'<h3 id="thirdHeading" class="thirdHeading">tutsmake.com</h3>'+
'<div id="bodyContent">'+
'<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>'+
'</div>'+
'</div>';
var infowindow = new window['google'].maps.InfoWindow({
content: contentString
});
marker.addListener('click', function() {
infowindow.open(map, marker);
});
In order to do any kind of interaction with the Maps API, you need an API key from Google. Follow the instructions here to get that set up. After the setup complete, You need to replace YOUR_API_KEYwith google map key.
You may noticed that, we have load the Google Maps JavaScript CDN under the renderMap method.
The renderMap method will check that the Google Maps JavaScript CDN is already loaded or not. If not then it will load the Google Maps JavaScript CDN. If already loaded then will call the loadMapmethod.
The loadMap will draw the map.
Next, We will call the renderMap method under ngOnInit method. like this
ngOnInit() {
this.renderMap();
}
Angular 8 will invoked the ngOnInit only once when the directive is instantiated.
After above changes our app.component.ts file will looks like this
import {AfterViewInit, Component, ElementRef, ViewChild, OnInit} from '@angular/core';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
@ViewChild('mapRef', {static: true }) mapElement: ElementRef;
constructor() {};
ngOnInit() {
this.renderMap();
}
loadMap = () => {
var map = new window['google'].maps.Map(this.mapElement.nativeElement, {
center: {lat: 24.5373, lng: 81.3042},
zoom: 8
});
var marker = new window['google'].maps.Marker({
position: {lat: 24.5373, lng: 81.3042},
map: map,
title: 'Hello World!',
draggable: true,
animation: window['google'].maps.Animation.DROP,
});
var contentString = '<div id="content">'+
'<div id="siteNotice">'+
'</div>'+
'<h3 id="thirdHeading" class="thirdHeading">tutsmake.com</h3>'+
'<div id="bodyContent">'+
'<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>'+
'</div>'+
'</div>';
var infowindow = new window['google'].maps.InfoWindow({
content: contentString
});
marker.addListener('click', function() {
infowindow.open(map, marker);
});
}
renderMap() {
window['initMap'] = () => {
this.loadMap();
}
if(!window.document.getElementById('google-map-script')) {
var s = window.document.createElement("script");
s.id = "google-map-script";
s.type = "text/javascript";
s.src = "https://maps.googleapis.com/maps/api/js?key=AIzaSyDRmqZ-1VD-DbsccElMGtMtlRz9FndbPB4&callback=initMap";
window.document.body.appendChild(s);
} else {
this.loadMap();
}
}
Running application:
Run application using ng serve –o and you should see Google Maps inside browser. Congrats!! See, it was easy.
