ondragstart event

[This documentation is preliminary and is subject to change.]

Fires on the source object when the user starts to drag a text selection or selected object.


HTML Attribute <element ondragstart = "handler(event)">
Event Property object.ondragstart = handler;
attachEvent Method object.attachEvent("ondragstart", handler)
addEventListener Method object.addEventListener("dragstart", handler, useCapture)

Standards information

There are no standards that apply here.

Event information

Synchronous No
Bubbles No
Cancelable No

Event handler parameters


The ondragstart event is the first to fire when the user starts to drag the mouse. It is essential to every drag operation, yet is just one of several source events in the data transfer object model. Source events use the setData method of the dataTransfer object to provide information about data being transferred. Source events include ondragstart, ondrag, and ondragend.

When dragging anything other than an img object, some text to be dragged must be selected.

Calls the associated event handler.

To invoke this event, do one of the following:

  • Drag the selected text or object.

The pEvtObj parameter is required for the following interfaces:

See also




About DHTML Data Transfer



Build date: 1/23/2012