D4

Uses a highly contextual, declarative syntax that reduces D3 boilerplate, as shown in examples where charts are built with minimal code like the 'Hello World' snippet.

Allows flexible customization by mixing in or out features like grids or axes, enabling sophisticated charts without monolithic configurations, per the 'Getting Fancy' example.

Exposes semantic CSS hooks for precise visual control, adhering to the philosophy that 'CSS is for styling' and allowing designers to override aesthetics without JavaScript.

Maintains the original data object without permanent transformations, ensuring data remains reusable by other scripts, as stated in the philosophy section.