JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://getfirebug.com/firebug-lite-debug.js"></script>
<div id="theFixed" style="position:fixed;top:250px;background-color:red">SOMETHING</div>

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JavaScript

var offset = $("#theFixed").offset()
$(window).scroll(function(){
    $("#theFixed").css("top",Math.max(offset.top,250-$(this).scrollTop()));
});