Feature/Email Regex Validation

Client-Side Components/Catalog Client Script/Email Validation/email_validation_onChange.js

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+function onChange(control, oldValue, newValue, isLoading) {
+    if (isLoading || newValue === '') {
+        return;
+    }
+
+    // Regular expression for email validation
+    var emailPattern = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
+
+    // Test the email against the pattern
+    if (!emailPattern.test(newValue)) {
+        g_form.showFieldMsg('email_field_name', 'Invalid email format. Example: user@example.com', 'error');
+        g_form.hideFieldMsg('email_field_name', true); // Clear info messages
+    } else {
+        g_form.hideFieldMsg('email_field_name'); // Clear error message
+        g_form.showFieldMsg('email_field_name', 'Valid email address', 'info');
+    }
+}

Client-Side Components/Catalog Client Script/Email Validation/email_validation_onSubmit.js

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+function onSubmit() {
+    // Get the email field value
+    var email = g_form.getValue('email_field_name'); // Replace 'email_field_name' with your actual field name
+
+    // Check if email field has a value
+    if (email) {
+        // Regular expression for email validation
+        var emailPattern = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
+
+        // Test the email against the pattern
+        if (!emailPattern.test(email)) {
+            g_form.addErrorMessage('Please enter a valid email address');
+            g_form.showFieldMsg('email_field_name', 'Invalid email format. Example: user@example.com', 'error');
+            return false; // Prevent form submission
+        }
+    }
+
+    return true; // Allow form submission
+}

Client-Side Components/Catalog Client Script/Email Validation/readme_email_validation.md

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+# ServiceNow Email Validation Catalog Client Script
+
+## Overview
+Client-side validation script for ServiceNow catalog items to ensure proper email format in user input fields.
+
+## Features
+- Real-time email format validation
+- Form submission prevention for invalid emails
+- User-friendly error messages
+- Standard email pattern validation
+
+## Implementation
+1. Navigate to **Service Catalog > Catalog Client Scripts**
+2. Create new script and select catalog item
+3. Choose script type: **onSubmit** or **onChange**
+4. Replace `email_field_name` with your field variable name
+5. Save and activate
+
+## Validation Rules
+- Required format: `user@domain.com`
+- Accepts: letters, numbers, dots, underscores, hyphens
+- Minimum 2-character domain extension
+
+## Script Types
+- **onSubmit**: Validates before form submission
+- **onChange**: Real-time validation as user types
+
+## Usage
+Best practice: Use both scripts for comprehensive validation and better user experience.