JSFiddle - React, Tailwind, and code Playground

HTML

<div class="row">
    <div><em>Regular block here</em></div>
    <div class="full-width"><em>Full width block here</em></div>
    <div><em>Regular block here</em></div>
</div>

JavaScript

$('div.row > .full-width').each(function() {
    var $rowDiv = $('<div class="row">');
    $(this).unwrap('.row');
    $(this).prev().wrap($rowDiv);
    $(this).next().wrap($rowDiv);
});