JSFiddle - React, Tailwind, and code Playground

HTML

<input type="hidden" name="label206451" value="0" />
    <label for="txt206451" class="swatch_text" >Chestnut Leather</label>
    <input type="checkbox" name="field206451" class="swatch_check" id="txt206451" value="SELECTED"/>
    <input type="hidden" name="HRuta" id="HRuta" value=""><asp:Label ID="LblRuta" runat="server" Text="Ruta:"></asp:Label><br />

JavaScript

var cb = document.getElementsByName('field206451')[0];
var label = document.getElementsByName('label206451')[0];


 
cb.addEventListener('click',function(evt){
 $("#LblRuta").text("CHINGADDDDOOOOOOO");
if(cb.checked){
    label.value='Thanks'
}else{
    label.value='0'
}
},false);