JSFiddle - React, Tailwind, and code Playground

HTML

<div id="dvStage1" class="milestoneWrap" runat="server">
                        <div class="grid_1 detailsWrap">
                            hi
                            <input type="text"></input>
                        </div>
                        <div class="grid_1 dateWrap">
                            yo, I'm blue
                            <input type="text"></input>
                        </div>
                    </div>
                    <div id="dvStage2" class="milestoneWrap" runat="server">
                        <div class="grid_1 detailsWrap">
                            hey
                            <input type="text"></input>
                        </div>
                        <div class="grid_1 dateWrap">
                            I'm blue too!
                            <input type="text"></input>
                        </div>
                    </div>
                    <div id="dvStage3" class="milestoneWrap hidden" runat="server">
                        <div class="grid_1 detailsWrap">
                            blou
                            <input type="text"></input>
                        </div>
                        <div class="grid_1 dateWrap">
                            no, black !
                            <input type="text"></input>
                        </div>
                    </div>

JavaScript

$(document).ready(function(){

$(".milestoneWrap:not(.hidden)").find(".dateWrap").css("color","blue");
  
  });