Fix deepEquals import in rjsf v5 (#464)

* clone deepEquals impl form @rjsf/utils v5 beta
* stop relying on deepEquals presence in @rjsf/core/utils
* might cause backwards compatibility issues on older rjsf version as the deepEquals implementation is different to the new one, but all tests pass 🤷‍♂️

Author: ivarprudnikov

package-lock.json

@@ -6,7 +6,7 @@
     "mavarazy <[email protected]>",
     "Aivaras Prudnikovas <[email protected]>"
   ],
-  "version": "1.4.0",
+  "version": "1.5.0",
   "scripts": {
     "build": "rimraf dist lib && npm run build:umd && npm run build:cjs && npm run build:es && npm run build:es:lib",
     "build:umd": "cross-env NODE_ENV=production BABEL_ENV=umd webpack --config webpack.config.dist.js",
@@ -57,6 +57,7 @@
   },
   "dependencies": {
     "deepcopy": "^2.0.0",
+    "lodash.isequalwith": "^4.4.0",
     "selectn": "^1.1.2"
   },
   "devDependencies": {

package.json

@@ -1,15 +1,12 @@
 import React, { Component } from 'react';
 import PropTypes from 'prop-types';
-import { toError } from './utils';
+import { toError, deepEquals } from './utils';
 import rulesRunner from './rulesRunner';
 
 import { DEFAULT_ACTIONS } from './actions';
 import validateAction from './actions/validateAction';
 import env from './env';
 
-const { utils } = require('@rjsf/core');
-const { deepEquals } = utils;
-
 /**
  * Intended to be used internally through applyRules(...)
  * but it also needs to be tested

src/applyRules.js

@@ -1,7 +1,6 @@
 import execute from "./actions";
 import deepcopy from "deepcopy";
-const { utils } = require("@rjsf/core");
-const { deepEquals } = utils;
+import { deepEquals } from './utils';
 
 function doRunRules(engine, formData, schema, uiSchema, extraActions = {}) {
   let schemaCopy = deepcopy(schema);

src/rulesRunner.js

@@ -1,5 +1,23 @@
 import { extractRefSchema } from "json-rules-engine-simplified/lib/utils";
 import env from "./env";
+import isEqualWith from "lodash/isEqualWith";
+
+/** Cloned from @rjsf/utils v5 to make it work in older rjsf versions
+ *
+ * @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
+ */
+export const deepEquals = (a, b) => {
+  return isEqualWith(a, b, (obj, other) => {
+    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
+  });
+};
 
 export const toArray = (field) => {
   if (Array.isArray(field)) {