Version 4.5.1 of MindFusion JavaScript Diagram contains the following new features and improvements -

Node constraints
The DiagramNode.constraints property lets you apply size and direction constraints to a node. It returns a NodeConstraints object with following properties:

• keepRatio: a bool value indicating whether the initial width/height ratio of a node should be preserved.
• maxHeight: the maximum node height allowed.
• maxWidth: the maximum node width allowed.
• minHeight: the minimum node height allowed.
• minWidth: the minimum node width allowed.
• moveDirection: a member of the DirectionConstraint enumeration. Set it to Horizontal or Vertical to let users move a node only in specified direction.

These constraints are considered when a user modifies the node interactively. They are ignored if node placement is changed programmatically by using API methods and properties.

Miscellaneous

• shapeLibraryLoaded event raised when library XML file is loaded and its shape definitions are available for use.
• fix for item hover events of DiagramDocument not raised by TabbedDiagramView.

If anyone is interested in trying the beta version, please download this archive containing updated script files:
https://mindfusion.eu/_beta/jsdiag451.zip

Any comments, questions and general feedback are welcome.