Include example HTML5 Drag and Drop API

There is a chapter called “Drag'n'Drop with mouse events”, and it makes a passing reference to the Drag and Drop API. There are plenty of cases where it’s appropriate to choose this approach.

However, I think there also needs to be a “Drag'n'Drop with the API” chapter.

I’ve been using the DND API on a learning project. Although I got over the strange hurdle of learning which events apply to draggable items and which events apply to drop zones, I’m at a point where I am really missing the awesome guidance I can find on most other topics in your excellent work.

For the purpose of inspiration in creating such a chapter (or for anyone else reading this), one tutorial I found helpful helpful is this video (which includes the basics of the DND API, and implements a list-sorting feature):

https://www.youtube.com/watch?v=jfYWwQrtzzY

https://javascript.info/mouse-drag-and-drop にある既存の「Drag'n'Drop with mouse events」章を読み、HTML5 Drag and Drop API の説明範囲を確認するため、参照されているチュートリアル動画を確認してください。draggable-item と drop-zone のイベントを含む API の説明と、いつ使用すべきかについての実践的な指針を盛り込んだ新しい章を追加すれば完了です。