JSFiddle - React, Tailwind, and code Playground

by André Albson

HTML

<div id="f">
    I'm going to follow you only so far...
</div>
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />
Lorem ipsum etc etc<br />

CSS

#f {
    background:#ace;
    padding:20px;
    width:200px;
    position:fixed; top:0; left:0;
}

JavaScript

var windw = this;

$.fn.followTo = function ( pos ) {
    var $this = this,
        $window = $(windw);
    
    $window.scroll(function(e){
        if ($window.scrollTop() > pos) {
            $this.css({
                position: 'absolute',
                top: pos
            });
        } else {
            $this.css({
                position: 'fixed',
                top: 0
            });
        }
    });
};

$('#f').followTo(250);