OptionalconstrainFunction to constrain movement of the elements.
OptionalcontainmentShortcut for some basic constrain scenarios - constrain to parent, constrain entirely to parent, dont allow movement into negative axes.
OptionalcontainmentIf containment is set, you can provide a value for padding here. Currently the default is 5 pixels.
OptionalfilterCSS3 filter identifying parts of the elements that should not allow drag
Options for an ElementDragger