Angular Leaflet - Map does does not render properly

Question

No matter which way I try in Angular 7, my Leaflet Map does not load properly. I get a block puzzle with half the screen grey and the other half in random disjointed map blocks (see pic).

Map Block Puzzle:

My HTML has been either:

<div 
  leaflet 
  [leafletOptions]="options">
</div>

or

<div id="map" class="map"></div>

My component is:

import * as L from "leaflet";
...
@Component( {
  styleUrls:  [ "../../../../node_modules/leaflet/dist/leaflet.css" ],
  templateUrl:  "./map.html"
} )
...
export class Map implements OnInit {

  map: any;

  options = {
    layers: [
        L.tileLayer('http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', { maxZoom: 7, attribution: '...' })],
        zoom: 5,
        center: L.latLng([ 46.879966, -121.726909 ])};

  async ngOnInit() {

    this.map =  L.map('map').setView( [37.8, -96], 4 );
    var osmUrl    = 'http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png';
    var osmAttrib = 'Map data © <a href="http://openstreetmap.org">OpenStreetMap</a> contributors';
    var osm       = new L.TileLayer( osmUrl, { minZoom: 1, maxZoom: 7, attribution: osmAttrib } );      
    this.map.addLayer( osm ); // */

  }

} 

My app-module.ts has the "LeafletModule.forRoot()" added to the Imports. invalidateSize() did not work for me, though perhaps I used it wrong. I did it with a setTimeout and not, in a method call.

Am I missing something? Do I have to add a script to INDEX.HTML like this or something?

<script src="http://cdn.leafletjs.com/leaflet-0.4/leaflet.js"></script>

I have searched a lot of posts and followed tutorials, but nothing gets me a nice map loaded.

Can anyone help?

Thanks, Moa

Answer 1

Here are the steps you need to follow:

1.install leaflet and import leaflet css style on angular.json

"styles": ["../node_modules/leaflet/dist/leaflet.css", "styles.css"],

2.import leaflet in your ts:

import * as L from "leaflet";

3.initialize your map inside ngOnInit:

map;
ngOnInit() {
    this.map = L.map("map").setView([46.879966, -121.726909], 7);

    L.tileLayer("https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png", {
          attribution:
            '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
    }).addTo(this.map);
}

Demo

You do not need to use script & cdns since you import the files directly from the local folder. Plus you were trying to use leaflet 0.4 which is really obsolete version