JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <div id="main"></div>
</div>

CSS

#container {
    width: 100%;
}

#main {
    width: 95%;
    overflow: hidden; 
}

JavaScript

$.get('page.php', function(result) {
    $('#main').html(result);
});
alert($('#main').width());