Added url validation

Author: Kathuria

README.md

@@ -19,6 +19,7 @@ npm install validate-functions
 - **IP Validation**: Validate IPv4 and IPv6 formats.
 - **Hex Color Validation**: Validate #RRGGBB or #RGB color formats.
 - **Postal/ZIP Code Validation**: Validate based on country-specific formats. It supports top 25 countries based on ISO 3166-1 alpha-2 codes namely: US, CN, IN, ID, PK, BR, NG, BD, RU, MX, JP, ET, PH, EG, VN, CD, TR, IR, DE, TH, GB, FR, IT, TZ, ZA.
+- **URL Validation**: Validate structure and it supports URLs with and without protocols, and it handles query parameters and fragments.
 
 
 Usage details are available [here](./USAGE_DETAILS.md).

USAGE_DETAILS.md

@@ -74,4 +74,14 @@ import { isValid_Postal_Code, CountryCode } from 'validate-functions/postal-zip'
 // India
 const indianPostalCode = '110001';
 console.log(isValid_Postal_Code(indianPostalCode, CountryCode.IN)); // Output: true
-```
+```
+
+- **isValid_URL**
+
+```typescript
+import { isValid_URL } from 'validate-functions/url';
+
+// Example of a URL with query parameters
+const urlWithQuery = 'http://example.com?name=value';
+console.log(isValid_URL(urlWithQuery)); // Output: true
+```

src/__tests__/url.test.ts

@@ -0,0 +1,35 @@
+import { isValid_URL } from '../url';
+
+describe('URL Validation', () => {
+  it('should return true for a valid HTTP URL', () => {
+    expect(isValid_URL('http://example.com')).toBe(true);
+  });
+
+  it('should return true for a valid HTTPS URL', () => {
+    expect(isValid_URL('https://example.com')).toBe(true);
+  });
+
+  it('should return true for a valid URL without protocol', () => {
+    expect(isValid_URL('example.com')).toBe(true);
+  });
+
+  it('should return false for a URL with invalid characters', () => {
+    expect(isValid_URL('http://example.com/<>')).toBe(false);
+  });
+
+  it('should return true for a URL with query parameters', () => {
+    expect(isValid_URL('http://example.com?name=value')).toBe(true);
+  });
+
+  it('should return true for a URL with a fragment', () => {
+    expect(isValid_URL('http://example.com#section')).toBe(true);
+  });
+
+  it('should return false for an empty string', () => {
+    expect(isValid_URL('')).toBe(false);
+  });
+
+  it('should return false for a URL with only protocol', () => {
+    expect(isValid_URL('http://')).toBe(false);
+  });
+});

src/index.ts

@@ -5,3 +5,4 @@ export * from './ip';
 export * from './hex-color';
 export * from './postal-zip'
 export * from './ssn';
+export * from './url';

src/url.ts

@@ -0,0 +1,9 @@
+/**
+ * Validate structure and optionally check if it's HTTPS.
+ * @param url - The URL to validate.
+ * @returns True if the URL is valid, otherwise false.
+ */
+export const isValid_URL = (url: string): boolean => {
+  const urlRegex = /^(https?:\/\/)?([a-zA-Z0-9-]+\.)+[a-zA-Z]{2,}(:\d+)?(\/[^\s<>]*)?(\?[^\s<>]*)?(#[^\s<>]*)?$/i;
+  return urlRegex.test(url);
+};