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本教程将一步步教你从零开发、打包并发布一个 TypeScript 工具库到 npm。以日期时间格式化工具为例，涵盖项目初始化、Vite 打包、类型声明输出、npm 配置、实际发布等完整流程，适合开发者直接套用。

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📁 项目结构预览

ts-date-utils/
├── dist/                     # 构建产物输出目录
│   ├── types/                # 类型声明文件输出目录
│   ├── ts-date-utils.es.js  # ES 模块
│   └── ts-date-utils.umd.js # UMD 模块
├── src/
│   └── index.ts              # 工具函数主入口
├── package.json              # 项目和发布配置
├── tsconfig.json             # TypeScript 配置
├── vite.config.ts            # Vite 打包配置
├── README.md                 # 包文档说明
└── .gitignore

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🧱 初始化项目

mkdir ts-date-utils && cd ts-date-utils
npm init -y
npm install typescript vite -D
npx tsc --init
npm install @types/node -D

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✍️ 编写功能模块

src/index.ts

export function formatDate(date: Date, format: string = 'YYYY-MM-DD HH:mm:ss'): string {const map: Record<string, string> = {'YYYY': date.getFullYear().toString(),'MM': (date.getMonth() + 1).toString().padStart(2, '0'),'DD': date.getDate().toString().padStart(2, '0'),'HH': date.getHours().toString().padStart(2, '0'),'mm': date.getMinutes().toString().padStart(2, '0'),'ss': date.getSeconds().toString().padStart(2, '0')};return format.replace(/YYYY|MM|DD|HH|mm|ss/g, m => map[m]);
}export function formatTimestamp(timestamp: number, format: string = 'YYYY-MM-DD HH:mm:ss'): string {return formatDate(new Date(timestamp), format);
}export function now(format: string = 'YYYY-MM-DD HH:mm:ss'): string {return formatDate(new Date(), format);
}export function parseDateString(str: string): Date {return new Date(str.replace(/-/g, '/'));
}export function isValidDate(val: unknown): val is Date {return val instanceof Date && !isNaN(val.getTime());
}

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⚙️ 配置 TypeScript

tsconfig.json

{"compilerOptions": {"target": "ES2020","module": "ESNext","lib": ["ES2020", "DOM", "DOM.Iterable"],"moduleResolution": "node","esModuleInterop": true,"declaration": true,"declarationDir": "dist/types","emitDeclarationOnly": true,"outDir": "dist","skipLibCheck": true,"isolatedModules": true,"moduleDetection": "force","strict": true,"noUnusedLocals": true,"noUnusedParameters": true,"noFallthroughCasesInSwitch": true,"noUncheckedSideEffectImports": true,"types": ["node"]},"include": ["src"]
}

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🔧 配置 Vite 打包

vite.config.ts

import { defineConfig } from 'vite';
import { resolve } from 'path';export default defineConfig({build: {lib: {entry: resolve(__dirname, 'src/index.ts'),name: 'TsDateUtils',fileName: (format) => `ts-date-utils.${format}.js`,formats: ['es', 'umd']},rollupOptions: {external: [],output: {globals: {}}}}
});

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📦 配置 package.json

{"name": "kaze-ts-date-utils","version": "1.0.0","description": "A simple and flexible TypeScript date formatting library","main": "dist/ts-date-utils.umd.js","module": "dist/ts-date-utils.es.js","types": "dist/types/index.d.ts","files": ["dist","README.md"],"scripts": {"build": "vite build && tsc --emitDeclarationOnly","prepublishOnly": "npm run build"},"keywords": ["date","format","typescript","utils","time"],"author": "kaze","license": "MIT","devDependencies": {"@types/node": "^20.0.0","typescript": "^5.0.0","vite": "^5.0.0"}
}

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📖 添加 README.md（简略）

# ts-date-utils> A simple and flexible TypeScript date formatting utility.## 安装
```bash
npm install kaze-ts-date-utils

使用示例

import { formatDate, now } from 'kaze-ts-date-utils';
console.log(now());
console.log(formatDate(new Date(), 'YYYY/MM/DD HH:mm'));

---## 🚀 发布到 npm1. 登录 npm（只需一次）
```bash
npm login

2. 打包构建

npm run build

3. 发布

npm publish

注意：版本号每次发布必须递增。

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🧠 发布后的版本管理建议

• bugfix / 小改动 → npm version patch
• 新功能 → npm version minor
• 有破坏性改动 → npm version major

发布更新：

npm version patch && npm publish

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✅ 恭喜你，现在你已经掌握了完整的 TypeScript npm 包开发与发布流程！