fix(interopDefault): do not override existing props (#7)

unjs · Oct 12, 2021 · 9429606 · 9429606
1 parent 4430fe3
commit 9429606
Showing 1 changed file with 14 additions and 10 deletions.
diff --git a/lib/index.mjs b/lib/index.mjs
@@ -115,19 +115,23 @@ export function interopDefault (sourceModule) {
   for (const key in sourceModule) {
     if (key === 'default') {
       try {
-        Object.defineProperty(newModule, key, {
-          enumerable: false,
-          configurable: false,
-          get () { return newModule }
-        })
+        if (!(key in newModule)) {
+          Object.defineProperty(newModule, key, {
+            enumerable: false,
+            configurable: false,
+            get () { return newModule }
+          })
+        }
       } catch (_err) {}
     } else {
       try {
-        Object.defineProperty(newModule, key, {
-          enumerable: true,
-          configurable: true,
-          get () { return sourceModule[key] }
-        })
+        if (!(key in newModule)) {
+          Object.defineProperty(newModule, key, {
+            enumerable: true,
+            configurable: true,
+            get () { return sourceModule[key] }
+          })
+        }
       } catch (_err) {}
     }
   }