fix: extend is equal with file comparison logic #3911

package.json

@@ -40,7 +40,6 @@
     "eslint-plugin-prettier": "^4.0.0",
     "eslint-plugin-promise": "^5.1.0",
     "eslint-plugin-standard": "^5.0.0",
-    "fast-deep-equal": "^3.1.3",
     "filesize": "^8.0.7",
     "flush-promises": "^1.0.2",
     "fs-extra": "^10.1.0",

packages/vee-validate/src/useField.ts

@@ -13,10 +13,8 @@ import {
   ComponentInternalInstance,
 } from 'vue';
 import { klona as deepCopy } from 'klona/full';
-import isEqual from 'fast-deep-equal/es6';
 import { validate as validateValue } from './validate';
 import {
-  ValidationResult,
   MaybeRef,
   GenericValidateFunction,
   YupValidator,
@@ -37,6 +35,7 @@ import {
   isYupValidator,
   applyModelModifiers,
   withLatest,
+  isEqual,
 } from './utils';
 import { isCallable } from '../../shared';
 import { FieldContextKey, FormContextKey, IS_ABSENT } from './symbols';

packages/vee-validate/src/useFieldState.ts

@@ -1,8 +1,7 @@
 import { computed, reactive, ref, Ref, unref, watch } from 'vue';
-import isEqual from 'fast-deep-equal/es6';
 import { FormContextKey } from './symbols';
 import { FieldMeta, FieldState, MaybeRef } from './types';
-import { getFromPath, injectWithSelf } from './utils';
+import { getFromPath, injectWithSelf, isEqual } from './utils';
 
 export interface StateSetterInit<TValue = unknown> extends FieldState<TValue> {
   initialValue: TValue;

packages/vee-validate/src/useForm.ts

@@ -13,7 +13,6 @@ import {
   markRaw,
   watchEffect,
 } from 'vue';
-import isEqual from 'fast-deep-equal/es6';
 import { klona as deepCopy } from 'klona/full';
 import {
   FieldMeta,
@@ -47,6 +46,7 @@ import {
   debounceAsync,
   isEmptyContainer,
   withLatest,
+  isEqual,
 } from './utils';
 import { FormContextKey } from './symbols';
 import { validateYupSchema, validateObjectSchema } from './validate';

packages/vee-validate/src/utils/assertions.ts

@@ -111,3 +111,81 @@ export function isEvent(evt: unknown): evt is Event {
 export function isPropPresent(obj: Record<string, unknown>, prop: string) {
   return prop in obj && obj[prop] !== IS_ABSENT;
 }
+
+/**
+ * Compares if two values are the same borrowed from:
+ * https://github.com/epoberezkin/fast-deep-equal
+ * We added a case for file matching since `Object.keys` doesn't work with Files.
+ * */
+export function isEqual(a: any, b: any) {
+  if (a === b) return true;
+
+  if (a && b && typeof a === 'object' && typeof b === 'object') {
+    if (a.constructor !== b.constructor) return false;
+
+    // eslint-disable-next-line no-var
+    var length, i, keys;
+    if (Array.isArray(a)) {
+      length = a.length;
+      // eslint-disable-next-line eqeqeq
+      if (length != b.length) return false;
+      for (i = length; i-- !== 0; ) if (!isEqual(a[i], b[i])) return false;
+      return true;
+    }
+
+    if (a instanceof Map && b instanceof Map) {
+      if (a.size !== b.size) return false;
+      for (i of a.entries()) if (!b.has(i[0])) return false;
+      for (i of a.entries()) if (!isEqual(i[1], b.get(i[0]))) return false;
+      return true;
+    }
+
+    // We added this part for file comparison, arguably a little naive but should work for most cases.
+    // #3911
+    if (a instanceof File && b instanceof File) {
+      if (a.size !== b.size) return false;
+      if (a.name !== b.name) return false;
+      if (a.lastModified !== b.lastModified) return false;
+      if (a.type !== b.type) return false;
+
+      return true;
+    }
+
+    if (a instanceof Set && b instanceof Set) {
+      if (a.size !== b.size) return false;
+      for (i of a.entries()) if (!b.has(i[0])) return false;
+      return true;
+    }
+
+    if (ArrayBuffer.isView(a) && ArrayBuffer.isView(b)) {
+      length = (a as any).length;
+      // eslint-disable-next-line eqeqeq
+      if (length != (b as any).length) return false;
+      for (i = length; i-- !== 0; ) if ((a as any)[i] !== (b as any)[i]) return false;
+      return true;
+    }
+
+    if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
+    if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
+    if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();
+
+    keys = Object.keys(a);
+    length = keys.length;
+    if (length !== Object.keys(b).length) return false;
+
+    for (i = length; i-- !== 0; ) if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
+
+    for (i = length; i-- !== 0; ) {
+      // eslint-disable-next-line no-var
+      var key = keys[i];
+
+      if (!isEqual(a[key], b[key])) return false;
+    }
+
+    return true;
+  }
+
+  // true if both NaN, false otherwise
+  // eslint-disable-next-line no-self-compare
+  return a !== a && b !== b;
+}

scripts/config.js

@@ -50,7 +50,7 @@ function createConfig(pkg, format) {
         }),
         tsPlugin,
         resolve({
-          dedupe: ['fast-deep-equal/es6', 'fast-deep-equal', 'klona', 'klona/full'],
+          dedupe: ['klona', 'klona/full'],
         }),
         commonjs(),
       ],