Step-by-Step Guide on Incorporating leaflet-control-geocoder into Angular 12.x

After successfully integrating Leaflet into Angular 12 using the following commands:

npm install leaflet
npm install @asymmetrik/ngx-leaflet
npm install --save-dev @types/leaflet

I made sure to include the styles:

./node_modules/leaflet/dist/leaflet.css
in the angular.json file and added the LeafletModule to my app.module.ts.

The map was functioning properly, however, I wanted to incorporate a search input control from geocoder. To achieve this, I included the necessary link and script for geocoder functionality in my index.html, which can be found here.

This is a snippet of my TypeScript file:

import { Component, AfterViewInit } from '@angular/core';
import * as L from 'leaflet';

@Component({
 selector: 'app-root',
 templateUrl: './app.component.html',
 styleUrls: ['./app.component.css'],
})

export class AppComponent implements AfterViewInit {
  title = 'leaf-let';

  private map: any;

  constructor() {}

  ngAfterViewInit(): void {
   this.initMap();
  }

  private initMap(): void {
   this.map = L.map('map').setView([14.094167, -87.206667], 15);

   const tiles = L.tileLayer(
   'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
   {
     maxZoom: 19,
     attribution:'&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> ` 
       `contributors',
   }
 );

 tiles.addTo(this.map);

  //L.Control.geocoder().addTo(this.map);
 }

However, when attempting to add the geocoder control with

L.Control.geocoder().addTo(this.map);
, it resulted in the following error:

property 'geocoder' does not exist on type 'typeof control'

Answer №1

The necessary library and its style have not been included:

  1. Make sure to install leaflet-control-geocoder
  2. import "leaflet-control-geocoder/dist/Control.Geocoder.css";
  3. import "leaflet-control-geocoder/dist/Control.Geocoder.js";

It appears that ngx-leaflet is not being used, but rather vanilla leaflet. In this case, the following approach should be taken:

private initMap(): void {
    this.map = L.map("map").setView([14.094167, -87.206667], 15);

    const tiles = 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);

    tiles.addTo(this.map);

    (L.Control as any).geocoder().addTo(this.map);
}

To avoid a typescript error, initialize the plugin using (L.Control as any). The error you encountered was likely due to not importing the library beforehand.

See Demo

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