LombokCharts
A zero-dependency charting library for the browser. It pairs a small grammar-of-graphics core (Data → Scale → Mark) with pluggable Canvas and SVG renderers, LTTB decimation, and a real-time streaming layer — so the same API draws a five-point bar chart or a five-million-point line without changing shape.

Features

  • Zero runtime dependencies. Native Canvas2D / SVG / ResizeObserver / requestAnimationFrame / typed arrays only.
  • Scales to millions Typed-array pipeline + LTTB decimation keeps million-point series interactive.
  • Real-time built in appendData, async iterators, EventSource, WebSocket — one redraw per frame.
  • Two renderers, one API. Canvas by default (fast path for huge series), SVG when you want crisp vector output or DOM-inspectable nodes.
  • Scales from tiny to massive. Typed-array pipeline plus Largest-Triangle-Three-Buckets (LTTB) decimation keeps million-point series interactive.
  • Tree-shakeable. Register only the marks you use and the rest is dropped by your bundler.
  • ~18 KB gzipped for the full build with every mark registered; far less for a custom subset.
  • Charts that scale from 5 points to 5 million.
  • Templates Trading Terminal Candlestick + volume + RSI with a synchronized crosshair, live order book, trade form, and watchlist sparklines.
  • Templates Analytics Dashboard KPI cards with sparklines, revenue area/line, donut, horizontal bar, treemap, and an activity heatmap.
  • Templates Monitoring Dashboard Real-time gauges, ring-buffered streaming areas, and a per-host latency sparkline table.
  • Templates CRM Dashboard Sidebar app-shell with a sales funnel, sankey lead flow, rep leaderboard, and contacts table.

Project Samples

Canvas and SVG renderers, LTTB decimation,real-time streaming layer Zero deps · Canvas + SVG · grammar-of-graphics Analytics dashboard template. Synthetic data via analytics-sim.js. Charts by LombokCharts, UI by LombokCSS. Try the design-style switcher and the date-range selector. LombokCharts stress LTTB decimation · Canvas fast path, Charts that scale from 5 points to 5 million. Comparison runs with LTTB on for both renderers (raw millions of nodes is infeasible for SVG). Numbers depend on your machine/GPU. All data is simulated in the browser via market-sim.js (GBM candles, synthetic order book, Wilder RSI). Charts by LombokCharts, UI by LombokCSS. Switch design styles by changing data-style on <html>.

Project Activity

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Categories

Frameworks, Web Development, Charting Libraries

License

Apache License V2.0

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Additional Project Details

Operating Systems

Android, Apple iPhone, ChromeOS, Linux, Mac, Windows

Intended Audience

Developers

User Interface

Web-based

Programming Language

JavaScript

Related Categories

JavaScript Frameworks, JavaScript Web Development Software, JavaScript Charting Libraries

Registered

2026-07-05
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