Dev

CHANGELOG.md

@@ -1,6 +1,12 @@
 ## Changelog
 
-### [v5.19.3](https://github.com/panates/valgen/compare/v5.19.2...v5.19.3) - 
+### [v5.19.4](https://github.com/panates/valgen/compare/v5.19.3...v5.19.4) - 
+
+#### 🚀 New Features
+
+- feat: Handle TypeScript enums in isEnum validator @Eray Hanoğlu 
+
+### [v5.19.3](https://github.com/panates/valgen/compare/v5.19.2...v5.19.3) -  19 January 2026 
 
 #### 🪲 Fixes
 

package.json

@@ -1,7 +1,7 @@
 {
   "name": "valgen",
   "description": "Fast runtime type validator, converter and io (encoding/decoding) library",
-  "version": "5.19.3",
+  "version": "5.19.4",
   "author": "Panates",
   "license": "MIT",
   "private": true,

src/rules/type-rules/is-enum.ts

@@ -9,16 +9,24 @@ import {
  * Validates if given value is one of enum values.
  * @validator isEnum
  */
-export function isEnum<T1, I1>(
-  values: I1 | I1[],
+export function isEnum<T1>(
+  values: any,
   options?: ValidationOptions & {
     caseInSensitive?: boolean;
     enumName?: string;
   },
-): Validator<T1, I1 | I1[]> {
+): Validator<T1, any> {
   const caseInSensitive = !!options?.caseInSensitive;
   const enumName = options?.enumName;
   // Prepare an object for fast lookup
+  if (values && typeof values === 'object' && !Array.isArray(values)) {
+    const keys = Object.keys(values).filter(k => !/^\d+$/.test(k));
+    values = keys.reduce((a, k) => {
+      if (values[k] != null) a.push(values[k]);
+      return a;
+      // v => !(typeof v === 'number' && !keys.includes(String(v))),
+    }, [] as any[]);
+  }
   const valObj = (Array.isArray(values) ? values : [values]).reduce<any>(
     (a, v) => {
       if (typeof v === 'string' && caseInSensitive) a[v.toUpperCase()] = true;

test/type-rules/is-enum.spec.ts

@@ -12,4 +12,17 @@ describe('isEnum', () => {
     );
     expect(() => vg.isEnum(['a', 'b'])(null as any)).toThrow('must be one of');
   });
+
+  it('should validate value using TypeScript enums', () => {
+    enum Enum1 {
+      a = 0,
+      b = 1,
+    }
+    enum Enum2 {
+      a = 'a',
+      b = 'b',
+    }
+    expect(vg.isEnum(Enum1)(0)).toStrictEqual(0);
+    expect(vg.isEnum(Enum2)('a')).toStrictEqual('a');
+  });
 });