HTML ondragover Event Attribute
Definition and Usage
The ondragover attribute fires when a draggable element or text selection is being dragged over a valid drop target.
By default, data/elements cannot be dropped in other elements. To allow a drop, we must prevent the default handling of the element. This is done by calling the event.preventDefault() method for the ondragover attribute.
Drag and drop is a very common feature in HTML5. It is when you "grab" an object and drag it to a different location. For more information, see our HTML Tutorial on HTML5 Drag and Drop.
Note: To make an element draggable, use the global HTML5 draggable attribute.
Tip: Links and images are draggable by default, and do not need the draggable attribute.
There are many event attributes that are used, and can occur, in the different stages of a drag and drop operation:
- Events fired on the draggable target (the source element):
- Events fired on the drop target:
Note: While dragging an element, the ondragover event fires every 350 milliseconds.
The numbers in the table specify the first browser version that fully supports the event attribute.
Differences Between HTML 4.01 and HTML5
The ondragover attribute is new in HTML5.
|script||The script to be run on ondragover|
|Supported HTML tags:||ALL HTML elements|
HTML Tutorial: HTML5 Drag and Drop
HTML Reference: HTML draggable Attribute
HTML DOM Reference: ondragover Event
HTML Event Attributes