Data transfer not calling out the data store modes (Protected, Read/Write, Readonly)

[markjerz]

MDN URL

https://developer.mozilla.org/en-US/docs/Web/API/HTML_Drag_and_Drop_API/Drag_operations

What specific section or headline is this issue about?

Drag data

What information was incorrect, unhelpful, or incomplete?

It would be useful to mention the different "Drag data store mode"s that apply for different events in this section. Specifically, it's not clear that you can not access the data transfer values on dragenter, dragleave (etc). In the 3rd paragraph, you say:

During the drag, in an event listener for the dragenter and dragover events, you use the data types of the data being dragged to check whether a drop is allowed

It talks about using the types to determine if a drop is allowed but should also say that using the value is not possible.

What did you expect to see?

As above

Do you have any supporting links, references, or citations?

https://html.spec.whatwg.org/dev/dnd.html#dndevents

Do you have anything more you want to share?

No response

MDN metadata

Page report details

• Folder: en-us/web/api/html_drag_and_drop_api/drag_operations
• MDN URL: https://developer.mozilla.org/en-US/docs/Web/API/HTML_Drag_and_Drop_API/Drag_operations
• GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/web/api/html_drag_and_drop_api/drag_operations/index.md
• Last commit: e9b6cd1
• Document last modified: 2025-04-10T14:56:07.000Z