How to convert jQuery to Vanilla JS

Question

Anyone knows how to convert from jQuery to Vanilla JS?

This code i share for slide up / down / toggle

jQuery(document).ready(function () { 
        autoExpand = setTimeout(function () {
            jQuery("#catfish_expanded").slideDown('slow');
        }, 2000);
    
        var interval = null;
        autoCollapsed = function (time) {
            interval = setTimeout(function () {
                jQuery("#catfish_expanded,#catfish_collapsed").slideToggle("slow");
            }, time);
        }
        autoCollapsed(12000);
    
        jQuery("#catfish_collapsed").on("click", function () {
            jQuery("#catfish_expanded,#catfish_collapsed").slideToggle("slow");
            autoCollapsed(10000);
        });
        jQuery(".close_txt").on("click", function () {
            jQuery("#catfish_expanded,#catfish_collapsed").slideToggle("slow");
            clearTimeout(interval);
        }); });