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If the dragover event is not canceled, run the appropriate step from the following list:

If the current target element is a text field (e.g. textarea, or an input element whose type attribute is in the Text state) or an editing host or editable element, and the drag data store item list has an item with the drag data item type string "text/plain" and the drag data item kind Plain Unicode string
-> Set the current drag operation to either "copy" or "move", as appropriate given the platform conventions.

If the current target element is an element with a dropzone attribute that matches the drag data store and specifies an operation
-> Set the current drag operation to the operation specified by the dropzone attribute of the current target element.

If the current target element is an element with a dropzone attribute that matches the drag data store and does not specify an operation
-> Set the current drag operation to "copy".

Otherwise
-> Reset the current drag operation to "none".