Truechart Plus

An extension runs inside the host's update loop, data model and memory budget. A chart that works fine in a standalone React app can freeze the whole report when it redraws on every cross-filter, resize and selection. Clients also need custom encodings over tens of thousands of rows.

Each visual has three layers: a data layer that flattens the host's data, a D3 layout layer that computes scales and paths without touching the DOM, and a thin React layer that renders the result. Keeping D3 out of the DOM stops two libraries fighting over the same nodes and makes the layout testable without a browser.

• Layout memoized on the host's data revision, so a resize never recomputes scales
• Canvas rendering for series too large for SVG
• Shared theme tokens, so every extension inherits the report's styling
• Typed property-pane schemas, so no formatting option ships without a handler

I lead a team of 4+ developers: I set the architecture, review every pull request and unblock people before it costs a sprint. We also refactored the legacy React code by removing unnecessary useEffect dependencies and by decoupling state and moving it next to the components that use it. Screens that re-rendered 2–3 extra times now render only when their own state changes, about 25% fewer re-renders overall.