@dropdown-datepicker/core NPM

@dropdown-datepicker/core

The framework-agnostic core logic for building a customizable dropdown-style datepicker. This package provides utilities and types to handle date selection via day, month, and year dropdowns — making it easy to integrate into any UI framework (React, Vue, Svelte, etc.).

✨ Features

📅 Dropdown selection for day, month, and year
📦 Framework-agnostic, pure TypeScript logic
🧠 Intelligent handling of leap years and varying month lengths
🔧 Designed for use in component libraries or design systems
🪶 Lightweight dependency on dayjs

📦 Installation

npm install @dropdown-datepicker/core
# or
pnpm add @dropdown-datepicker/core
# or
yarn add @dropdown-datepicker/core

🛠️ Usage Example

import {
    generateDays,
    generateMonths,
    generateYears,
    isValidDate,
} from "@dropdown-datepicker/core";

// Generate options
const days = generateDays(2025, 4); // April 2025
const months = generateMonths(); // January to December
const years = generateYears({ from: 1900, to: 2100 });

// Validate date
const isValid = isValidDate({ day: 31, month: 4, year: 2025 }); // false (April has 30 days)