Use ?. where it represents the intended semantics (#11512)

packages/babel-core/src/config/files/configuration.js

@@ -71,8 +71,9 @@ export function* findRelativeConfig(
         loc,
         envName,
         caller,
-        packageData.pkg && packageData.pkg.dirname === loc
-          ? packageToBabelConfig(packageData.pkg)
+        packageData.pkg?.dirname === loc
+          ? // $FlowIgnore - packageData.pkg is not null
+            packageToBabelConfig((packageData.pkg: ConfigFile))
           : null,
       );
     }

packages/babel-core/src/config/index.js

@@ -17,7 +17,8 @@ export type { PartialConfig } from "./partial";
 
 const loadOptionsRunner = gensync<[mixed], Object | null>(function*(opts) {
   const config = yield* loadFullConfig(opts);
-  return config ? config.options : null;
+  // NOTE: We want to return "null" explicitly, while ?. alone returns undefined
+  return config?.options ?? null;
 });
 
 const maybeErrback = runner => (opts: mixed, callback: Function) => {

packages/babel-core/src/transform-file.js

@@ -25,15 +25,7 @@ type TransformFile = {
 
 const transformFileRunner = gensync<[string, ?InputOptions], FileResult | null>(
   function*(filename, opts) {
-    let options;
-    if (opts == null) {
-      options = { filename };
-    } else if (opts && typeof opts === "object") {
-      options = {
-        ...opts,
-        filename,
-      };
-    }
+    const options = { ...opts, filename };
 
     const config: ResolvedConfig | null = yield* loadConfig(options);
     if (config === null) return null;

packages/babel-core/src/transformation/block-hoist-plugin.js

@@ -44,7 +44,7 @@ const blockHoistPlugin = {
         let hasChange = false;
         for (let i = 0; i < node.body.length; i++) {
           const bodyNode = node.body[i];
-          if (bodyNode && bodyNode._blockHoist != null) {
+          if (bodyNode?._blockHoist != null) {
             hasChange = true;
             break;
           }
@@ -52,7 +52,7 @@ const blockHoistPlugin = {
         if (!hasChange) return;
 
         node.body = sortBy(node.body, function(bodyNode) {
-          let priority = bodyNode && bodyNode._blockHoist;
+          let priority = bodyNode?._blockHoist;
           if (priority == null) priority = 1;
           if (priority === true) priority = 2;