How can I integrate Google Maps APIs inside an Angular 2 component
Question
I have an Angular 2 component that is defined in the file comp.ts in this way like this:
import {Component} from 'angular2/core';
@component({
selector:'my-comp',
templateUrl:'comp.html'
})
export class MyComp{
constructor(){
}
}
Because I want the component to show a google map, I have inserted in the file comp.html the following code:
<!DOCTYPE html>
<html>
<head>
<script src="http://maps.googleapis.com/maps/api/js"></script>
<script>
function initialize() {
var mapProp = {
center:new google.maps.LatLng(51.508742,-0.120850),
zoom:5,
mapTypeId:google.maps.MapTypeId.ROADMAP
};
var map=new google.maps.Map(document.getElementById("googleMap"),mapProp);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="googleMap" style="width:500px;height:380px;"></div>
</body>
</html>
This code has been copied from this link http://www.w3schools.com/googleAPI/google_maps_basic.asp . The problem is that the component doesn't show the map. What have I done wrong?
3 answers
solution1
22 2016-08-07 09:33:57
Yeah, you could do so. But there would be an error in typescript compiler, so don't forget to implicitly declare google variable.
declare var google: any;
add this directive right after component import.
import { Component, OnInit } from '@angular/core';
declare var google: any;
@Component({
moduleId: module.id,
selector: 'app-root',
templateUrl: 'app.component.html',
styleUrls: ['app.component.css']
})
export class AppComponent implements OnInit {
ngOnInit() {
var mapProp = {
center: new google.maps.LatLng(51.508742, -0.120850),
zoom: 5,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("gmap"), mapProp);
}
}
solution2
16 ACCPTED 2016-05-20 12:44:36
I have found a solution. First of all, the following line:
<script src="http://maps.googleapis.com/maps/api/js?key=[YOUR_API_KEY]"></script>
must be inserted in the index.html file. The code which creates the map must be inserted in the comp.ts file. In particular, it must be inserted in a special method, namely "ngOnInit", which can be positioned after the constructor of the class. This is comp.ts:
import { Component } from 'angular2/core';
declare const google: any;
@Component({
selector: 'my-app',
templateUrl:'appHtml/app.html',
styleUrls: ['css/app.css']
})
export class AppMainComponent {
constructor() {}
ngOnInit() {
let mapProp = {
center: new google.maps.LatLng(51.508742, -0.120850),
zoom: 5,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
let map = new google.maps.Map(document.getElementById("googleMap"), mapProp);
}
}
Finally, the div with id "googleMap", which is going to contain the google map, must be inserted in the comp.html file, which will look like this:
<body>
<div id="googleMap" style="width:500px;height:380px;"></div>
</body>
solution3
-5 2016-11-18 01:35:32
Use angular2-google-maps: https://angular-maps.com/
import { BrowserModule } from '@angular/platform-browser';
import { NgModule, ApplicationRef } from '@angular/core';
import { AgmCoreModule } from 'angular2-google-maps/core';
@Component({
selector: 'app-root',
styles: [`
.sebm-google-map-container {
height: 300px;
}
`],
template: `
<sebm-google-map [latitude]="lat" [longitude]="lng"></sebm-google-map>
`
})
export class AppComponent {
lat: number = 51.678418;
lng: number = 7.809007;
}
@NgModule({
imports: [
BrowserModule,
AgmCoreModule.forRoot({
apiKey: 'YOUR_GOOGLE_MAPS_API_KEY'
})
],
declarations: [ AppComponent ],
bootstrap: [ AppComponent ]
})
export class AppModule {}
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