tsconfig.base.json

/**
 * Default TypeScript config for the inlang project.
 *
 * The goal of this config is strict ESM compilation across the inlang project.
 * See https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c#how-can-i-make-my-typescript-project-output-esm
 */
{
	"compilerOptions": {
		// Set the compiler to ESM (node16)
		"module": "Node16",
		// Resolve modules with ESM (node16)
		"moduleResolution": "Node16",
		// Compile to ... syntax (makes importing easier, if the importing environment does not support new syntax features)
		"target": "ES2020", // ES2020 = Node.js 14
		// To provide backwards compatibility, Node.js allows you to import most CommonJS packages with a default import. This flag tells TypeScript that it's okay to use import on CommonJS modules.
		"allowSyntheticDefaultImports": true,
		// ESM doesn't support JSON modules yet.
		"resolveJsonModule": false,
		// Create type declaration files (otherwise no typesafety for the importing module)
		"declaration": true,
		// For debugging
		"sourceMap": true,
		// Strict type checking
		"strict": true,
		// forcing consistens casing in files is a life saver (different environments deal with file casing differently)
		"forceConsistentCasingInFileNames": true,
		// only include certain types in node modules, see https://stackoverflow.com/a/69649992
		// commonjs types of imported dependencies error out otherwise
		"types": ["node"],
		// Don't check imported libraries for type errors.
		// The imported libraries might have different settings/whatever.
		"skipLibCheck": true,
		"skipDefaultLibCheck": true,
		// Lint JS files
		"checkJs": true,
		// Distingish between type imports and code imports.
		"importsNotUsedAsValues": "error",
		// tremendous helper to avoid hard to debug bugs.
		// see https://github.com/inlang/inlang/issues/157
		"noUncheckedIndexedAccess": true,
		// enables better DX https://twitter.com/kuizinas/status/1636641120477384705?s=20
		"declarationMap": true,
		"noImplicitAny": true,
		"noImplicitReturns": true,
		"noFallthroughCasesInSwitch": true,
		"noImplicitOverride": true,
		"allowUnreachableCode": false
	}
}