tsconfig.json + tsup.config.ts for npm packages

tsconfig.json

{
    "compilerOptions": {
        "strict": true,
        "noImplicitAny": true,
        "esModuleInterop": true,
        "strictNullChecks": true,
        "target": "ES2022",
        "moduleResolution": "Node10",
        "module": "CommonJS",
        "declaration": true,
        "isolatedModules": true,
        "noEmit": true,
        "outDir": "dist"
    },
    "include": ["src"],
    "exclude": ["node_modules"]
}

tsup.config.ts

import { defineConfig } from 'tsup';
 
export default defineConfig({
    format: ['cjs', 'esm'],
    entry: ['./src/index.ts'],
    dts: true,
    shims: true,
    skipNodeModulesBundle: true,
    clean: true,
});