Validation Functions

Author: JanluOfficial

snippets/javascript/validation/validate-a-credit-card-number.md

@@ -0,0 +1,16 @@
+---
+title: Validate a Credit Card Number
+description: Validates a Credit Card Number for a variety of major international credit card formats, including Visa, MasterCard, American Expres, Diners Club and JCB.
+author: JanluOfficial
+tags: validation,url
+---
+
+```js
+function validateCreditCardNumber(cardNumber) {
+    const cardRegex = /^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|6(?:011|5[0-9]{2})[0-9]{12}|(?:2131|1800|35\d{3})\d{11})$/;
+    return cardRegex.test(cardNumber);
+}
+
+// Usage:
+validateCreditCardNumber("4111111111111111"); // Returns: true
+```

snippets/javascript/validation/validate-a-url.md

@@ -0,0 +1,16 @@
+---
+title: Validate a URL
+description: Validates a URL.
+author: JanluOfficial
+tags: validation,url
+---
+
+```js
+function validateURL(url) {
+    const urlRegex = /^(https?|http?|ftp):\/\/[^\s/$.?#].[^\s]*$/i;
+    return urlRegex.test(url);
+}
+
+// Usage:
+validateURL("https://www.example.com"); // Returns: true
+```

snippets/javascript/validation/validate-a-us-phone-number.md

@@ -0,0 +1,16 @@
+---
+title: Validate a US Phone Number
+description: Validates a phone number from the United States of America.
+author: JanluOfficial
+tags: validation,phone,united-states
+---
+
+```js
+function validateUSPhoneNumber(phoneNumber) {
+    const phoneRegex = /^\(?([0-9]{3})\)?[-. ]?([0-9]{3})[-. ]?([0-9]{4})$/;
+    return phoneRegex.test(phoneNumber);
+}
+
+// Usage:
+validateUSPhoneNumber("123-456-7890"); // Returns: true
+```

snippets/javascript/validation/validate-an-email-adress.md

@@ -0,0 +1,16 @@
+---
+title: Validate an Email Adress
+description: Validates an Email Adress
+author: JanluOfficial
+tags: validation,email
+---
+
+```js
+function validateEmail(email) {
+    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+    return emailRegex.test(email);
+}
+
+// Usage:
+validateEmail("[email protected]"); // Returns: true
+```

snippets/javascript/validation/validate-an-international-phone-number.md

@@ -0,0 +1,16 @@
+---
+title: Validate an international Phone Number
+description: Validates an international Phone Number.
+author: JanluOfficial
+tags: validation,phone,international
+---
+
+```js
+function validateInternationalPhoneNumber(phoneNumber) {
+    const phoneRegex = /^\+?[1-9]\d{1,14}$/;
+    return phoneRegex.test(phoneNumber);
+}
+
+// Usage:
+validateInternationalPhoneNumber("+1234567890"); // Returns: true
+```