Handle _setInProgress in a try-catch-finally

Author: asamuzaK

lib/CSSStyleDeclaration.js

@@ -174,8 +174,8 @@ class CSSStyleDeclaration {
     if (this._parentRule || (this._ownerNode && this._setInProgress)) {
       return;
     }
-    this._setInProgress = true;
     try {
+      this._setInProgress = true;
       const valueObj = parseCSS(
         val,
         {
@@ -246,8 +246,9 @@ class CSSStyleDeclaration {
       }
     } catch {
       return;
+    } finally {
+      this._setInProgress = false;
     }
-    this._setInProgress = false;
     if (typeof this._onChange === "function") {
       this._onChange(this.cssText);
     }