From fa0532f75f8eeda4738f0de85548ca33872d5c3b Mon Sep 17 00:00:00 2001
From: Durgeshwar-AI <durgesh34shaw94@gmail.com>
Date: Tue, 14 Oct 2025 20:37:27 +0530
Subject: [PATCH 1/2] Created tests for isDecimal

---
 test/validators/isDecimal.test.js | 46 +++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 test/validators/isDecimal.test.js

diff --git a/test/validators/isDecimal.test.js b/test/validators/isDecimal.test.js
new file mode 100644
index 000000000..8da276cd6
--- /dev/null
+++ b/test/validators/isDecimal.test.js
@@ -0,0 +1,46 @@
+import test from '../testFunctions';
+
+describe('isDecimal', () => {
+  it('Checks whether a number is Decimal or not', () => {
+    test({
+      validator: 'isDecimal',
+      valid: ['1.2', '+2.4', '-122.5'],
+      invalid: ['+-2.4'],
+    });
+    test({
+      validator: 'isDecimal',
+      args: [{ locale: 'ar', force_decimal: false, decimal_digits: '1' }],
+      valid: ['1٫2', '+2٫4', '-122٫5'],
+      invalid: ['+-2٫4', '2.4', '12٫8979', '1,2'],
+    });
+    test({
+      validator: 'isDecimal',
+      valid: ['1.2', '+2.4', '-122.5', '.5', '+.5', '-.5', '0.123', '1.234'],
+      invalid: ['', ' ', '+', '-', '1,2', '1.', ' 1.2', '1.2 ', '+-2.4'],
+    });
+    test({
+      validator: 'isDecimal',
+      args: [{ force_decimal: true }],
+      valid: ['1.0', '+.5', '-.5', '0.12', '.1'],
+      invalid: ['1', '2', '', '1.', ' 1.0'],
+    });
+    test({
+      validator: 'isDecimal',
+      args: [{ force_decimal: true, decimal_digits: '2' }],
+      valid: ['1.23', '+.12', '-0.12', '0.00'],
+      invalid: ['1.2', '1.234', '1', '.1', '.123'],
+    });
+    test({
+      validator: 'isDecimal',
+      args: [{ decimal_digits: '1,3' }],
+      valid: ['1.2', '1.23', '1.234', '.1', '.12', '.123'],
+      invalid: ['1.', '1.2345', '.1234'],
+    });
+    test({
+      validator: 'isDecimal',
+      args: [{ locale: 'ar' }],
+      valid: ['1٫2', '٫5', '+٫5', '-٫5'],
+      invalid: ['1.2', '1,2', '1٫', ' 1٫2'],
+    });
+  });
+});

From 9be4820f74f35de0e211c5006417ba69c4721167 Mon Sep 17 00:00:00 2001
From: Durgeshwar-AI <durgesh34shaw94@gmail.com>
Date: Tue, 14 Oct 2025 22:34:31 +0530
Subject: [PATCH 2/2] Created the validator for NanoID checking

---
 src/index.js                     |  2 ++
 src/lib/isNanoID.js              | 26 +++++++++++++++
 test/validators/isNanoID.test.js | 56 ++++++++++++++++++++++++++++++++
 3 files changed, 84 insertions(+)
 create mode 100644 src/lib/isNanoID.js
 create mode 100644 test/validators/isNanoID.test.js

diff --git a/src/index.js b/src/index.js
index 87be7113c..ff80eb730 100644
--- a/src/index.js
+++ b/src/index.js
@@ -129,6 +129,7 @@ import isLicensePlate from './lib/isLicensePlate';
 import isStrongPassword from './lib/isStrongPassword';
 
 import isVAT from './lib/isVAT';
+import isNanoID from './lib/isNanoID';
 
 const version = '13.15.15';
 
@@ -245,6 +246,7 @@ const validator = {
   isLicensePlate,
   isVAT,
   ibanLocales,
+  isNanoID,
 };
 
 export default validator;
diff --git a/src/lib/isNanoID.js b/src/lib/isNanoID.js
new file mode 100644
index 000000000..a4a9f92f0
--- /dev/null
+++ b/src/lib/isNanoID.js
@@ -0,0 +1,26 @@
+import assertString from './util/assertString';
+import merge from './util/merge';
+
+function regexExp(options) {
+  const alphabets = options.alphabets;
+  const underscore = options.underscore ? '_' : '';
+  const hyphen = options.hyphen ? '-' : '';
+  const charClass = `${alphabets}${underscore}${hyphen}`;
+  const regExp = new RegExp(`^[${charClass}]{${options.length}}$`);
+  return regExp;
+}
+
+const default_options = {
+  alphabets: 'A-Za-z0-9',
+  length: '1,',
+  hyphen: true,
+  underscore: true,
+};
+
+export default function isNanoID(str, options) {
+  assertString(str);
+  options = merge(options, default_options);
+  return regexExp(options).test(str);
+}
+
+isNanoID('ABC456', { alphabets: 'ABCDEF123456' });
diff --git a/test/validators/isNanoID.test.js b/test/validators/isNanoID.test.js
new file mode 100644
index 000000000..1703e7ce0
--- /dev/null
+++ b/test/validators/isNanoID.test.js
@@ -0,0 +1,56 @@
+import test from '../testFunctions';
+
+describe('isNanoID', () => {
+  it('default options', () => {
+    test({
+      validator: 'isNanoID',
+      valid: ['Aiugiu645654sdf', 'D87D', '_-jj', 'A_B-C'],
+      invalid: ['+999', 'RGRY$', ' ', '*abc'],
+    });
+  });
+
+  it('custom alphabets', () => {
+    test({
+      validator: 'isNanoID',
+      args: [{ alphabets: 'ABCDEF123' }],
+      valid: ['ACABE', '123123', 'A1_C', 'F-1'],
+      invalid: [
+        '+999',
+        'RGRY$',
+        ' ',
+        'Aiugiu645654sdf',
+        'D87D',
+        'aoihdof',
+        '_-jj',
+        'G12',
+      ],
+    });
+  });
+
+  it('hyphen disabled', () => {
+    test({
+      validator: 'isNanoID',
+      args: [{ hyphen: false }],
+      valid: ['ACABE', '123123', '_jj', 'Aiugiu645654sdf', 'D87D'],
+      invalid: ['-999', 'A-B', 'RGRY$', ' '],
+    });
+  });
+
+  it('underscore disabled', () => {
+    test({
+      validator: 'isNanoID',
+      args: [{ underscore: false }],
+      valid: ['ACABE', '123123', '-jj', 'Aiugiu645654sdf', 'D87D'],
+      invalid: ['_123', 'A_B', 'RGRY$', ' '],
+    });
+  });
+
+  it('fixed length', () => {
+    test({
+      validator: 'isNanoID',
+      args: [{ length: 6 }],
+      valid: ['ABC123', 'a1B_9-'],
+      invalid: ['ABC12', 'ABC1234', 'ABC+12'],
+    });
+  });
+});