Mike Zupperlearn

Branch from DuckDB, course 2 of 3

A Reactive Dashboard with Lit and Signals

Build a real analytics interface on web components: a TC39 signals store, a debounced query runner that cannot render a stale result, twelve Lit components with their own shadow styles, D3 charts, and a design system that recolors from one slider. Free and text-first.

Level
intermediate
Lessons
11
Price
Free

Stops on this branch

11 lessons, about 9 hours.

From DuckDB, Aug 15, 2026

  1. 1The Store Is a Module50 min
  2. 2A Debounced, Race-Free Query Runner60 min
  3. 3First Components, and the Scaffolding Dies50 min
  4. 4Stat Cards and Sparklines45 min
  5. 5Filters on Platform Primitives50 min
  6. 6The Dual-Handle Slider and a Reset That Appears50 min
  7. 7D3 Inside a Shadow Root55 min
  8. 8The Heatmap D3 Didn't Build40 min
  9. 9The Table: Sort, Paginate, Pivot60 min
  10. 10The App Explains Itself50 min
  11. 11What "Wow" Costs, as One Diff55 min

Terminus Twelve Lit components on a TC39 signals store.

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