Create Readme.md

Author: SachinNarayanasamy

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

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+Phone Number Validation — Client Script 
+Overview
+
+This Client Script validates that users enter their phone numbers in the strict format: (123) 456-7890.
+
+It is triggered whenever the Phone field changes on a sys_user record. If the input does not match the required format, the script:
+
+Displays an inline error message directly below the field.
+
+Clears the invalid input so the user can re-enter the correct value.
+
+This script is designed to be dynamic, simple, and user-friendly.
+
+Features
+
+Ensures phone numbers follow the exact format (123) 456-7890.
+
+Provides immediate feedback via field-level error messages.
+
+Clears invalid entries automatically to prevent submission errors.
+
+Works on Classic UI forms and provides clear messaging to the user.
+
+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