Develop a fresh Leaflet control within an Angular 2+ application

Currently, I am incorporating leaflet, leaflet-editable, and Angular into a project. My goal is to develop controls that allow for drawing a multi polygon on the map, similar to the example showcased on the GitHub page. The code in my component is structured as follows:

import 'leaflet';
import 'leaflet-editable';

...

this.map = L.map('map', {editable: true}).setView([-0.163360, 13.053125], 3).addLayer(osm);
L.NewPolygonControl = L.Control.extend({
  options: {
    position: 'topleft'
  },
  // rest of the control implementation
});
L.AddPolygonShapeControl = L.Control.extend({
  options: {
    position: 'topleft'
  },
  // more of the control implementation
});
this.map.addControl(new L.NewPolygonControl());
this.map.addControl(new L.AddPolygonShapeControl());

Despite the controls functioning correctly, an error message appears post-compile containing the following details:

ERROR in src/app/pages/countryEdit/country/country.component.ts(84,7):         
error TS2339: Property 'NewPolygonControl' does not exist on type         
'typeof L'.
src/app/pages/countryEdit/country/country.component.ts(110,7): error 
TS2339: Property 'AddPolygonShapeControl' does not exist on type 
'typeof L'.
src/app/pages/countryEdit/country/country.component.ts(134,31): error 
TS2339: Property 'NewPolygonControl' does not exist on type 'typeof 
L'.
src/app/pages/countryEdit/country/country.component.ts(135,31): error 
TS2339: Property 'AddPolygonShapeControl' does not exist on type 
'typeof L'.

As my expertise with Angular and TypeScript are still growing, solving this compile issue proves challenging. I have included types for leaflet and leaflet-editable but the error persists.

Answer №1

If you're facing a similar issue, here's a solution to consider. Instead of adding a new property directly to L, you can create a new variable and assign the value to it. For example, instead of using L.NewControl = 'bla bla', you can use const newControl = 'bla bla'. Then, simply use the new variable just like you would have used L.NewControl. This approach worked smoothly for me with no compilation errors.

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