Revert #4446 due to regression

CHANGELOG.md

@@ -17,6 +17,10 @@ should change the heading of the (upcoming) version to include a major version b
 -->
 # 5.24.3
 
+## @rjsf/utils
+
+- Rollback [4446](https://github.com/rjsf-team/react-jsonschema-form/pull/4446) due to regression
+
 ## Dev / docs / playground
 - Fixed issue with selector, where validator was getting refreshed on clicking on anything in selector. [#4472](https://github.com/rjsf-team/react-jsonschema-form/pull/4472)
 

packages/utils/package.json

@@ -36,7 +36,6 @@
     "react": "^16.14.0 || >=17"
   },
   "dependencies": {
-    "fast-equals": "^5.2.2",
     "json-schema-merge-allof": "^0.8.1",
     "jsonpointer": "^5.0.1",
     "lodash": "^4.17.21",

packages/utils/src/deepEquals.ts

@@ -1,22 +1,19 @@
-import { createCustomEqual } from 'fast-equals';
+import isEqualWith from 'lodash/isEqualWith';
 
-/** Implements a deep equals using the `fast-equals.createCustomEqual` function, providing a customized comparator that assumes all functions are equivalent.
+/** Implements a deep equals using the `lodash.isEqualWith` function, that provides a customized comparator that
+ * assumes all functions are equivalent.
  *
  * @param a - The first element to compare
  * @param b - The second element to compare
  * @returns - True if the `a` and `b` are deeply equal, false otherwise
  */
-const deepEquals = createCustomEqual({
-  createCustomConfig: () => ({
-    // Assume all functions are equivalent
-    // see https://github.com/rjsf-team/react-jsonschema-form/issues/255
-    //
-    // Performance improvement: knowing that typeof a === function, so, only needs to check if typeof b === function.
-    // https://github.com/planttheidea/fast-equals/blob/c633c4e653cacf8fd5cbb309b6841df62322d74c/src/comparator.ts#L99
-    areFunctionsEqual(_a, b) {
-      return typeof b === 'function';
-    },
-  }),
-});
-
-export default deepEquals;
+export default function deepEquals(a: any, b: any): boolean {
+  return isEqualWith(a, b, (obj: any, other: any) => {
+    if (typeof obj === 'function' && typeof other === 'function') {
+      // Assume all functions are equivalent
+      // see https://github.com/rjsf-team/react-jsonschema-form/issues/255
+      return true;
+    }
+    return undefined; // fallback to default isEquals behavior
+  });
+}