• Add sideEffects: false to the package.json.

• Fix default drag.filter on control-click. #62
• Fix default drag.touchable if navigator.maxTouchPoints. #47
• Update dependencies.
• Adopt exact paths for imports.
• Adopt explicit files for publishing.

• Housekeeping.

• Update dependencies.

• Optimize drag.touchable slightly.

• Add drag.touchable. (#41) Thanks, @nicolas-van!

• Only register touch event listeners on platforms that support touch.
• When touch is supported, set the touch-action style to “none”.

• Add drag.clickDistance for setting the click distance threshold.
• Fix click suppression to ignore mousemove events that don’t actually move (#28).

• Add module entry point to package.json.

• First stable release.

Changes since D3 3.x

The drag behavior d3.behavior.drag has been renamed to d3.drag. The drag.origin method has been replaced by drag.subject, which allows you to define the thing being dragged at the start of a drag gesture. This is particularly useful with Canvas, where draggable objects typically share a Canvas element (as opposed to SVG, where draggable objects typically have distinct DOM elements); see the circle dragging example.

A new drag.container method lets you override the parent element that defines the drag gesture coordinate system. This defaults to the parent node of the element to which the drag behavior was applied. For dragging on Canvas elements, you probably want to use the Canvas element as the container.

Drag events now expose an event.on method for registering temporary listeners for duration of the current drag gesture; these listeners can capture state for the current gesture, such as the thing being dragged. A new event.active property lets you detect whether multiple (multitouch) drag gestures are active concurrently. The dragstart and dragend events have been renamed to start and end. By default, drag behaviors now ignore right-clicks intended for the context menu; use drag.filter to control which events are ignored. The drag behavior also ignores emulated mouse events on iOS. The drag behavior now consumes handled events, making it easier to combine with other interactive behaviors such as zooming.

The new d3.dragEnable and d3.dragDisable methods provide a low-level API for implementing drag gestures across browsers and devices. These methods are also used by other D3 components, such as the brush.

See CHANGES for all D3 changes since 3.x.

• Export to the global d3 in vanilla environments (d3/d3#2840).

• Only consume handled touch events.

• Add event.target.

• The d3.drag constructor no longer takes an optional started listener (#23).
• Removed drag.x and drag.y; use drag.subject instead (#24).

• Use the pointer coordinates as the default subject if the initiating datum is undefined (#18).
• Fix the reported dx, dy and listeners during beforestart.

• Add d3.dragDisable and d3.dragEnable (#22).
• Expose dx and dy on drag events (#21).
• Use the initiating element as the default subject if the associated datum is undefined (#18).

• Events consumed by the drag behavior no longer propagate.
• The prevention of default behaviors is now slightly more efficient.
• You can no longer customize which default behaviors are prevented.
• Emulated mouse events within 500ms of the end of a touch gesture are now ignored.
• Text selection and native dragging are only suppressed during mouse gestures.

• Add event.active.

• The default subject no longer falls back to the element if the datum is undefined.