JSFiddle - React, Tailwind, and code Playground

HTML

<input type="radio" name="RadioTest" value="1" /> 1 <br />
<input type="radio" name="RadioTest" value="2" /> 2 <br />
<input type="radio" name="RadioTest" value="3" /> 3 <br />
<input type="radio" name="RadioTest" value="4" /> 4 <br />

JavaScript

$(document).ready(function(){
  $("input[name='RadioTest'][value='3']").prop('checked', true);
})

console.log($("input[name='RadioTest']").val())