Major updates in 0.4.0:

• classes and class are finally here. No more repeating styles!
• Introducing Grid diagrams. A very popular form of diagramming software architecture.

To showcase both of these, here's a demo with a link to the source code below:

• Playground link to source code

Bunch of other features, improvements, and bug fixes too. Make sure to check out the updated docs for how to use these new features!

Features 🚀

• Classes are implemented. See docs. #772
• Grid diagrams are implemented. See docs. #1122
• Container with constant key near attribute now can have descendant objects and connections (thank you @donglixiaoche) #1071
• Multi-board SVG outputs with internal links go to their output paths #1116

Improvements 🧹

• Labels on parallel dagre connections include a gap between them #1134
• Sequence diagram lifelines inherit the actor's stroke and stroke-dash #1140
• Add text-transform styling option (thank you @alexstoick for these 2) #1118

Bugfixes ⛑️

• Fix inheritence in scenarios/steps #1090
• Fix a bug in 32bit builds #1115
• Fix a bug in ID parsing #322
• Fix a bug in watch mode parsing SVG #1119
• Namespace transitions so that multiple animated D2 diagrams can exist on the same page #1123
• Fix a bug in vertical alignment of appendix lines #1104
• Fix precision difference for sketch mode running on different architectures #921
• Fix an issue where markdown fonts weren't being applied correctly #1132

Breaking changes

• class and classes are now reserved keywords.
• text-transform is now a reserved keyword.