simplify checkInRHS helper

babel · Nov 7, 2022 · afaaaf0 · afaaaf0
1 parent d4a066a
commit afaaaf0
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Showing 2 changed files with 4 additions and 6 deletions.
diff --git a/packages/babel-helpers/src/helpers-generated.ts b/packages/babel-helpers/src/helpers-generated.ts
@@ -43,7 +43,7 @@ export default Object.freeze({
   ),
   checkInRHS: helper(
     "7.20.1",
-    'export default function _checkInRHS(value){var type=typeof value;if("object"!==type&&"function"!==type)throw TypeError("right-hand side of \'in\' should be an object, got "+type);return value}',
+    "export default function _checkInRHS(value){return value}",
   ),
   jsx: helper(
     "7.0.0-beta.0",

diff --git a/packages/babel-helpers/src/helpers/checkInRHS.js b/packages/babel-helpers/src/helpers/checkInRHS.js
@@ -1,9 +1,7 @@
 /* @minVersion 7.20.1 */
 
 export default function _checkInRHS(value) {
-  var type = typeof value;
-  if (type !== "object" && type !== "function") {
-    throw TypeError("right-hand side of 'in' should be an object, got " + type);
-  }
-  return value;
+  // We don't care whether 0 is actually value's property,
+  // if value is not an object, 0 in value will throw a TypeError.
+  return 0 in value, value;
 }