tsconfig.json

{
	"compilerOptions": {
		"strict": true,
		"module": "NodeNext",
		"moduleResolution": "NodeNext",

		// tsup build target priorities:
		// 1. `tsup.config.js` file's `target` option
		// 2. `tsconfig.json` file's `target` value
		// 3. `node14` if unspecified (undesirable)

		// TypeScript configuration supports ECMAScript versions.
		// Reference https://www.typescriptlang.org/tsconfig#target

		// tsup configuration supports esbuild's target values.
		// e.g. es2020, chrome58, firefox57, node12, node12.19.0
		// Reference https://tsup.egoist.dev/#target-environment
		// Reference https://esbuild.github.io/api/#target

		// Node.js 18 LTS supports all ES2022 APIs.
		// Reference https://node.green/#ES2022

		"target": "ES2022",
		"lib": ["DOM", "ES2022"],

		"allowJs": true,
		"checkJs": true,
		"outDir": "dist" // tsup default output directory
	}
}