drag()

drag(selection)

Applies this drag behavior to the specified selection. This function is typically not invoked directly, and is instead invoked via selection.call. For example, to instantiate a drag behavior and apply it to a selection:

d3.selectAll(".node").call(d3.drag().on("start", started));

Internally, the drag behavior uses selection.on to bind the necessary event listeners for dragging. The listeners use the name .drag, so you can subsequently unbind the drag behavior as follows:

selection.on(".drag", null);

Applying the drag behavior also sets the -webkit-tap-highlight-color style to transparent, disabling the tap highlight on iOS. If you want a different tap highlight color, remove or re-apply this style after applying the drag behavior.