Document Typescript casting of event payload · geoman-io/leaflet-geoman#1014

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good first issuehelp wantedimprovementtypescript

説明

In the event payload the return type of layer is `L.Layer? so it needs to be casted to the Layer-Type.

layer.on('pm:edit', (e) => {
  if(e.shape === 'Polygon'){
     (e.layer as Polygon).getLatLngs();
  }
});

I think following should work too: (But not tested)

layer.on('pm:edit', (e) => {
  if(e.layer instanceof L.Polygon){
     (e.layer as Polygon).getLatLngs();
  }
});

This should documented in the Readme

Explainations:

技術スタック: typescript
領域: documentation
Issue 種別: documentation
難度: 2
推定時間: under 1 hour
活動状況: fresh
明確さ: clear
前提条件: TypeScript basicsleaflet geoman event system
初心者向け度: 80
調査方針: Add a section in the README.md file explaining how to cast the event payload's layer type to a specific type like Polygon. Use the code examples provided in the issue (e.g., `(e.layer as Polygon).getLatLngs()`) and reference the StackOverflow link and issue #945 for additional context. Ensure the documentation covers both the inline cast and the instanceof check approach.