Fix noFallthroughCasesInSwitch/jsx object is not extensible (facebook…

…#9921) Co-authored-by: Konstantin Simeonov <kon.simeonov@protonmail.com>
abhiisheek · May 19, 2023 · 5c21b7a · 5c21b7a
1 parent 4e38857
commit 5c21b7a
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/packages/react-scripts/scripts/utils/verifyTypeScriptSetup.js b/packages/react-scripts/scripts/utils/verifyTypeScriptSetup.js
@@ -218,6 +218,14 @@ function verifyTypeScriptSetup() {
   if (appTsConfig.compilerOptions == null) {
     appTsConfig.compilerOptions = {};
     firstTimeSetup = true;
+  } else {
+    // This is bug fix code of https://github.com/facebook/create-react-app/issues/9868
+    // Bellow code release variable from non-extensible and freeze status.
+    appTsConfig.compilerOptions = JSON.parse(JSON.stringify(appTsConfig.compilerOptions));
+
+    // Original appTsConfig.compilerOptions status
+    // Object.isExtensible(appTsConfig.compilerOptions) output: false
+    // Object.isFrozen(appTsConfig.compilerOptions) output: true
   }
 
   for (const option of Object.keys(compilerOptions)) {