fix: only index cachedData once

Author: aminya

lib/dom-styles-reader.js

@@ -40,8 +40,11 @@ export default class DOMStylesReader {
     const key = scopes.join(' ')
     let cachedData = this.domStylesCache.get(key)
 
-    if (cache && (cachedData !== undefined ? cachedData[property] : undefined) != null) {
-      return cachedData[property]
+    if (cache && cachedData !== undefined) {
+      const value = cachedData[property]
+      if (value != null) {
+        return value
+      }
     }
 
     this.ensureDummyNodeExistence(targetNode)