> For the complete documentation index, see [llms.txt](https://community-test.logicnets.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://community-test.logicnets.com/release-9/example-gallery/example-projects-for-parts/text-input-masking.md).

# Text Input Masking

## Overview

When you model a [text input](/release-9/platform-documentation/form-node-parts/text-input-numeric-input.md) field in your applications, you can use the 'Input Mask (RegEx)' function to require specific formatting in the input field using regular expressions.

## Text Mask

In this example project, the field formatting is set using a regular expression in the 'Input Mask (RegEx)' field so it only accepts the following: (^\[0-9]\*$).

![](https://2802811211-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdFhfexCjZ5JMhwGzzywq%2Fuploads%2Fgit-blob-ed0263a2d37b9e80c88034d79b90991d5aa4a9a0%2F8cfb9a90-da1c-4599-8a82-2baa5c72c98f.png?alt=media)

The 'Placeholder' field allows you to provide users with a hint about the characters they can use based on the the applied input mask. In the example, we show a watermark message stating 'Accepts only number eg:1234567'. If the user enters any characters other than numbers, the system will not display those characters in the text box.

![](https://2802811211-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdFhfexCjZ5JMhwGzzywq%2Fuploads%2Fgit-blob-c16beb0429963991f0115c6d1b3ddc688359c161%2F722b7207-0c3e-4494-8804-58da00432045.png?alt=media)

## Attachments

* [Text\_Input\_Mask.zip](https://github.com/logicnets/community-portal/tree/release-9/docs/.gitbook/assets/h4jx6t-Text_Input_Mask.zip)


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