JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cloud.github.com/downloads/digitalBush/jquery.maskedinput/jquery.maskedinput-1.3.min.js" type="text/javascript"></script>

<input type="text" id="txtMyInput" class="FocusSense"/>

JavaScript

$(document).ready(function () {
    jQuery(function ($) {            
        $("#txtMyInput").mask("?9.99");            
    });
    $(".FocusSense").focus(function (e) {
      var that = this;
      setTimeout(function(){$(that).select();},10);
      return false;
    });
});