React LeetCode Calendar

A beautiful, customizable React component that renders your LeetCode submission activity as a GitHub‑style contribution calendar.

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✨ Highlights

• Custom Date Range: Provide a startDate to render one year of activity from that date
• Flexible Sizing: Choose preset sizes or pass custom width/height
• 11 Polished Themes: From classic to vibrant modern palettes
• Full Color & Label Control: Override any color or label text
• Border‑Free, Modern UI: Clean, legible, and responsive

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📦 Installation

npm install react-leetcode-calendar

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⚡ Quick Start

import Leetcodecalendar from 'react-leetcode-calendar';

function App() {
  return <Leetcodecalendar username="your-leetcode-username" />;
}

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🔧 Props

Prop	Type	Default	Description
username	string	— (required)	Your LeetCode username
graph	'default' | 'yearly'	'default'	Graph mode
showTitle	boolean	true	Toggles the heading/title
size	'small' | 'medium' | 'large' | 'xl' | { width: number, height: number }	'medium'	Preset size or exact dimensions
startDate	string	undefined	Custom start date (YYYY-MM-DD), renders one year from this date
ui	string	'default'	Built‑in theme name (see below)
colors	object	undefined	Override colors (see Color Properties)
labels	object	undefined	Override labels (see Label Customization)

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🆕 Recent Updates — v2.6.0

• Added startDate for custom date range (one year window)
• Added custom size dimensions ({ width, height })
• Expanded and refined themes (11 total)
• Cleaner, border‑free appearance
• Documentation improvements

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🎨 Available UI Themes

1. default
2. purple-cyan
3. rainbow
4. ocean
5. sunset
6. forest
7. midnight
8. candy
9. matrix
10. masculine
11. deep-forest

Example:

<Leetcodecalendar username="saurabhhh777" ui="purple-cyan" />

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📏 Size Options

// Presets
<Leetcodecalendar username="saurabhhh777" size="small" />
<Leetcodecalendar username="saurabhhh777" size="medium" />
<Leetcodecalendar username="saurabhhh777" size="large" />
<Leetcodecalendar username="saurabhhh777" size="xl" />

// Custom dimensions
<Leetcodecalendar username="saurabhhh777" size={{ width: 300, height: 200 }} />

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📅 Custom Date Range

// Renders activity from Jan 1, 2023 to Jan 1, 2024
<Leetcodecalendar 
  username="saurabhhh777"
  graph="yearly"
  startDate="2023-01-01"
  ui="purple-cyan"
/>

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🎨 Complete Color Customization

<Leetcodecalendar 
  username="saurabhhh777"
  colors={{
    noActivity: "#1a1a1a",
    activity: ["#00ff00", "#00cc00", "#009900", "#006600", "#003300"],
    text: "#ffffff",
    title: "#00ff00",
    months: "#00ff00",
    weekdays: "#00ff00",
    totalCount: "#00ff00",
    legend: "#00ff00",
    background: "#000000",
    calendarBackground: "#0a0a0a",
    border: "#00ff00",
    hover: "#00cc00",
    loading: "#00ff00",
    error: "#ff0000",
    noData: "#00ff00"
  }}
/>

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🏷️ Label Customization

<Leetcodecalendar 
  username="saurabhhh777"
  labels={{
    months: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
    weekdays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
    totalCount: "Total submissions: 1234",
    legend: { less: "Few submissions", more: "Many submissions" }
  }}
/>

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🎛️ Color Properties

• noActivity: Color for days with no submissions
• activity: Array for activity levels (0–4)
• text: General text color
• title: Title text color
• months: Month labels color
• weekdays: Weekday labels color
• totalCount: Total submissions text color
• legend: Legend text color
• background: App background
• calendarBackground: Calendar area background
• border: Optional border color
• hover: Hover color
• loading: Loading text color
• error: Error text color
• noData: No‑data text color

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🌐 Data Source

The component fetches from a public LeetCode submissions endpoint:

https://leetcode-sub-endpoint.vercel.app/leetcode/{username}

Response format:

{
  "2024-08-31": 2,
  "2024-09-03": 4,
  "2024-09-09": 1
}

Note: This is a community endpoint and may be subject to rate limits or occasional changes. Consider caching responses in your app for resilience.

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🧪 Development

# Install dependencies
npm install

# Run tests
npm test

# Build the library
npm run build

# Run demo
cd demo && npm start

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📚 Dependencies

• React 18+
• TypeScript
• Axios (API requests)
• TanStack Query (React Query)
• React Activity Calendar (base calendar UI)

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🤝 Contributing

Contributions are welcome! Please open an issue or submit a PR with a clear description of the change. For larger updates, consider discussing your proposal in an issue first.

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👤 Developer

Maintained by @askbunnyyy.

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📄 License

MIT License. See the LICENSE file for details.

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🗒️ Changelog

v2.6.0

• Added custom date range via startDate
• Added custom size dimensions
• Enhanced themes (11 options) and refined visual design
• Removed deprecated neon theme
• Documentation improvements

v2.5.0

• Added multiple UI themes
• Enhanced color customization and styling
• Added size control options

v2.4.0

• Added custom colors, title control, and labels support
• Improved theming system

Earlier

• Initial LeetCode calendar with GitHub‑style graph
• Yearly and default graph modes