HTML to Tailwind class replacement - related to https://gist.github.com/learncss/0dece543913dd601c777b6909b2e30c9

extensions.pages.config.php

<?php
return [
   'ext:pages.template.filter.tailwindclasses'   => [
        'enable'    => true
    ],
];

extensions.pages.template.filter.tailwindclasses.php

<?php

class ExtPagesTemplateFilterTailwindclasses extends ComPagesTemplateFilterAbstract
{
    public function filter(&$text)
    {
    	// class="container wrapper"
        $text = preg_replace("/class=\"container wrapper\"/","class=\"container border flex flex-col justify-start v-spaced p-4\"", $text);
        
        // class="row
        $text = preg_replace("/class=\"row/","class=\"-mx-2 flex flex-wrap", $text);

        // class="col"
        $text = preg_replace("/class=\"col\"/","class=\"w-full flex px-2 flex-col", $text);
        // class="col 
        $text = preg_replace("/class=\"col /","class=\"w-full flex px-2 flex-col ", $text);

    }
}