Implement Custom D3 Question

Build custom D3 questions by defining state management via createDefaultState, handling interactivity with setInteractivity, and rendering with renderAll. This approach lets you design bespoke SVG/HTML interactions—draggable points, custom diagrams, hybrid interfaces—with integrated event handling and message protocols for grading student responses.

Yes. Custom D3 questions support fully bespoke visualizations outside standard templates. Use the standard components where applicable, but extend with tailored state, flexible rendering workflows, and window message listeners to handle unique, student-driven prompts with interactive elements graded by your logic.

Implement state management through createDefaultState for initialization and applyInitialState for restoration. Control interactivity locking via setInteractivity, sync state to the grading system with sendChartState, and bind event handlers within your rendering workflow to track student manipulations of draggable or interactive elements.

Custom D3 questions provide a pattern for draggable points and hybrid SVG/HTML interfaces through extensible rendering (renderAll) and event handling workflows. Define your SVG structure, attach drag behaviors, update state on interaction, and sync changes via the message protocol for seamless student interaction and assessment.

No strict requirement. While the pattern works with existing components when feasible, custom D3 questions are designed for truly bespoke interactions where standard components don't apply. Build from scratch using state management, rendering, and messaging functions to handle your unique visualization and grading logic.