electron/docs/fiddles/features/drag-and-drop/renderer.js

document.getElementById('drag1').ondragstart = (event) => {
  event.preventDefault()
  window.electron.startDrag('drag-and-drop-1.md')
}

document.getElementById('drag2').ondragstart = (event) => {
  event.preventDefault()
  window.electron.startDrag('drag-and-drop-2.md')
}