Fix hasMultipleHeritage logic (prettier#14289)

medikoo · Feb 7, 2024 · 259b22f · 259b22f
1 parent e01346b
commit 259b22f
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/src/language-js/print/class.js b/src/language-js/print/class.js
@@ -123,9 +123,10 @@ function printHardlineAfterHeritage(node) {
 
 function hasMultipleHeritage(node) {
   return (
-    ["superClass", "extends", "mixins", "implements"].filter((key) =>
-      Boolean(node[key])
-    ).length > 1
+    ["extends", "mixins", "implements"].reduce(
+      (count, key) => count + (Array.isArray(node[key]) ? node[key].length : 0),
+      node.superClass ? 1 : 0
+    ) > 1
   );
 }