https://youtu.be/j9IfEYrxoNA - Drag and Drop в HTML5
https://projects.calebevans.me/jcanvas/docs/draggableLayers/ - Drag and Drop в Canvas
https://habr.com/ru/post/125424/ - HTML5 Drag and Drop загрузка файлов
https://stackoverflow.com/questions/9581846/drag-and-drop-using-basic-jquery-framework - пример
https://developer.mozilla.org/ru/docs/Web/Guide/HTML/Drag_and_drop
https://habr.com/ru/post/423035/