fix: handle missing export map entry in ts resolution (#34)

Author: privatenumber

src/loaders.ts

@@ -138,7 +138,11 @@ export const resolve: resolve = async function (
 			try {
 				return await resolve(tsPath, context, defaultResolve, true);
 			} catch (error) {
-				if ((error as any).code !== 'ERR_MODULE_NOT_FOUND') {
+				const { code } = error as any;
+				if (
+					code !== 'ERR_MODULE_NOT_FOUND'
+					&& code !== 'ERR_PACKAGE_PATH_NOT_EXPORTED'
+				) {
 					throw error;
 				}
 			}
@@ -150,7 +154,7 @@ export const resolve: resolve = async function (
 		resolved = await defaultResolve(specifier, context, defaultResolve);
 	} catch (error) {
 		if (
-			(error instanceof Error)
+			error instanceof Error
 			&& !recursiveCall
 		) {
 			if ((error as any).code === 'ERR_UNSUPPORTED_DIR_IMPORT') {

tests/fixtures/package-module/node_modules/package-exports/index.js

@@ -21,5 +21,16 @@ export default testSuite(async ({ describe }, node: NodeApis) => {
 				expect(nodeProcess.stdout).toBe(output);
 			});
 		});
+
+		describe('Export map', ({ test }) => {
+			const output = '{"default":"default export","namedExport":"named export"}';
+
+			test('Import', async () => {
+				const nodeProcess = await node.import('package-exports/index.js', {
+					typescript: true,
+				});
+				expect(nodeProcess.stdout).toBe(output);
+			});
+		});
 	});
 });