Create Readme.md

Author: SachinNarayanasamy

Client-Side Components/Client Scripts/Whitespace Validation/Readme.md

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+Whitespace Validation — Client Script (ServiceNow)
+Overview
+
+This Client Script ensures that a field does not contain any whitespace characters. It validates user input in real-time and provides immediate feedback by displaying an inline error message directly below the field. Invalid input is cleared automatically to enforce proper data entry.
+
+Features
+
+Prevents any spaces in the field value.
+
+Displays field-level error messages below the input field.
+
+Automatically clears invalid input for user correction.
+
+Simple, lightweight, and does not use regex or getLabelOf.
+
+Works dynamically for any field where the Client Script is applied.
+
+Usage Instructions
+1. Create the Client Script
+
+Navigate to System Definition → Client Scripts.
+
+Click New to create a new Client Script.
+
+2. Configure the Script
+
+Name: Whitespace Validation
+
+Table: Select the target table (e.g., sys_user)
+
+Type: onChange
+
+Field: Select the field to validate (e.g., username, phone)
+
+Active: Check this box