tsconfig.json

{
	/// "extends": "@sindresorhus/tsconfig",
	"compilerOptions": {
		"noEmit": true,
		"noUnusedLocals": false, // Allow unused variables in test-d/*.ts files
		"target": "ES2021", // Node.js 16
		"lib": [
			"ES2021",
			"DOM"
		],
		"exactOptionalPropertyTypes": true,
		"skipLibCheck": false, // Ensures .d.ts files are checked: https://github.com/sindresorhus/tsconfig/issues/15

		// Compatibility
		"module": "commonjs",
		"moduleResolution": "node",

		// TODO: Use the reusable tsconfig again when targeting ESM.
		// From https://github.com/sindresorhus/tsconfig/blob/main/tsconfig.json
		"strict": true,
		"noImplicitReturns": true,
		"noImplicitOverride": true,
		"noUnusedParameters": true,
		"noFallthroughCasesInSwitch": true,
		// "noUncheckedIndexedAccess": true, // TODO: Enable.
		"noPropertyAccessFromIndexSignature": true,
		"useDefineForClassFields": true,
	}
}