Chart.js
Simple, flexible JavaScript charting library. Chart.js renders charts on HTML Canvas (not SVG) providing 8 core chart types: bar, line, pie, doughnut, radar, polar area, bubble, and scatter. Known for clean defaults, smooth animations, and a simpler API than D3 or ECharts. Available for vanilla JS and has official wrappers for React (react-chartjs-2), Vue (vue-chartjs), and Angular. Popular for embedding charts in existing applications without a heavy framework.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Local library — no network. Canvas rendering avoids SVG injection. MIT licensed.
⚡ Reliability
Best When
You need common chart types with minimal setup, good default styling, and want to avoid framework dependencies. Chart.js is the simplest path from data to chart.
Avoid When
You have large datasets, need uncommon chart types, or are building in React and want a component-native API — use Recharts or ECharts.
Use Cases
- • Add charts to existing vanilla JavaScript applications without a framework using Chart.js canvas-based rendering
- • Build simple analytics dashboards with line and bar charts using Chart.js' clean defaults and minimal configuration
- • Create accessible charts with Chart.js' built-in ARIA labels and screen reader support for inclusive applications
- • Display agent-generated metrics and statistics using Chart.js' straightforward data format and responsive container support
- • Embed charts in React applications using react-chartjs-2 wrapper for component-based chart management
Not For
- • Very large datasets (100K+ points) — Chart.js Canvas rendering degrades; use ECharts for large data
- • Complex chart types (maps, 3D, tree maps, network graphs) — Chart.js has 8 basic chart types; use ECharts for exotic types
- • Highly customized data visualizations — D3.js provides more control for bespoke visualizations
Interface
Authentication
Local library — no authentication.
Pricing
Chart.js is MIT open source. Free for personal and commercial use.
Agent Metadata
Known Gotchas
- ⚠ Chart.js 4.x changed how datasets are structured — dataset configuration (borderColor, backgroundColor) moved in some cases; check 4.x migration guide when upgrading from v3
- ⚠ react-chartjs-2 (the React wrapper) requires registering all Chart.js components used — missing registration of BarElement, LineElement, etc. causes blank charts without errors
- ⚠ Canvas charts must be destroyed before re-creating — if a React component unmounts and remounts, calling new Chart() on an existing canvas causes 'Canvas is already in use' error; call chart.destroy() in cleanup
- ⚠ Responsive charts require the canvas to be in a container with explicit dimensions — zero-height containers produce invisible charts
- ⚠ Chart.js tree-shaking requires explicit component registration — using Chart.auto.js bundles everything; for smaller bundles, import and register only needed components
- ⚠ Time-based axes require the 'chartjs-adapter-date-fns' or similar adapter — Chart.js 3+ removed built-in date adapter; missing adapter causes time scale axis to fail silently
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Chart.js.
Scores are editorial opinions as of 2026-03-06.