fix(shared): crash while resolving esm-only package (#49)

* fix(shared): crash while resolving esm-only package

* chore: changeset

.changeset/empty-poets-kick.md

@@ -0,0 +1,5 @@
+---
+'@wyw-in-js/shared': patch
+---
+
+Fix crash while resolving esm-only package. Fixes #43

packages/shared/src/findPackageJSON.ts

@@ -27,18 +27,29 @@ export function findPackageJSON(
 
     return cache.get(pkgPath);
   } catch (er: unknown) {
-    if (
-      typeof er === 'object' &&
-      er !== null &&
-      (er as { code?: unknown }).code === 'MODULE_NOT_FOUND'
-    ) {
+    const code =
+      typeof er === 'object' && er !== null && 'code' in er
+        ? er.code
+        : undefined;
+
+    if (code === 'MODULE_NOT_FOUND') {
       if (skipPathsOptions && filename) {
         return findPackageJSON(pkgName, null);
       }
 
       return undefined;
     }
 
+    if (code === 'ERR_PACKAGE_PATH_NOT_EXPORTED') {
+      // See https://github.com/Anber/wyw-in-js/issues/43
+      // `require` can't resolve ESM-only packages. We can use the `resolve`
+      // package here, but it does not solve all cases because `pkgName`
+      // can be an alias and should be resolved by a bundler. However, we can't use
+      // `resolve` from a bundler because it is async. The good news is that in that
+      // specific case, we can just ignore those packages. For now.
+      return undefined;
+    }
+
     throw er;
   }
 }