Create Readme.md

Author: SachinNarayanasamy

Client-Side Components/Client Scripts/validate phone number/Readme.md

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+Phone Number Validation — Client Script (ServiceNow)
+Overview
+
+This Client Script ensures that users enter their phone numbers in a strict format: (123) 456-7890.
+It is triggered whenever the Phone field changes and validates the input in real time.
+
+If the input does not match the required format, the script:
+
+Clears the invalid value.
+
+Displays a field-level error message directly below the field.
+
+Provides a fallback alert if field-level messaging is unavailable.
+
+This script is designed to be user-friendly, dynamic, and failsafe.
+
+Features
+
+Validates phone numbers in the format (123) 456-7890.
+
+Inline error messages appear directly below the field, avoiding top-of-page clutter.
+
+Clears invalid input to prevent incorrect data submission.
+
+Works dynamically for any phone field with minimal configuration.
+
+Provides fallback alert for environments where inline messages are unavailable.
+
+Usage Instructions
+1. Create the Client Script
+
+Navigate to System Definition → Client Scripts.
+
+Click New to create a client script.
+
+2. Configure the Script
+
+Name: Phone Number Validation
+
+Table: sys_user 
+
+Type: onChange
+
+Field: phone
+
+Active: Checked