JSFiddle - React, Tailwind, and code Playground

HTML

<div id="AlotOfContent">
</div>

<div id="popup">
    <textarea>
        a
        a
        a
        a
        a
        a
        a
        a
        a
    </textarea>
</div>

CSS

body,html {
  height:100%;   
}

#AlotOfContent {
  height:150%; 
}

#popup {
 position:fixed;
 left:50%;
 margin-left:-100px;
 margin-top:-50px;
 top:50%; 
}

textarea {
 width:200px;
 height:100px;:  
}

JavaScript

/*! Copyright (c) 2011 Brandon Aaron (http://brandonaaron.net)
 * Licensed under the MIT License (LICENSE.txt).
 *
 * Thanks to: http://adomas.org/javascript-mouse-wheel/ for some pointers.
 * Thanks to: Mathias Bank(http://www.mathias-bank.de) for a scope bug fix.
 * Thanks to: Seamus Leahy for adding deltaX and deltaY
 *
 * Version: 3.0.6
 * 
 * Requires: 1.2.2+
 */
(function(a){function d(b){var c=b||window.event,d=[].slice.call(arguments,1),e=0,f=!0,g=0,h=0;return b=a.event.fix(c),b.type="mousewheel",c.wheelDelta&&(e=c.wheelDelta/120),c.detail&&(e=-c.detail/3),h=e,c.axis!==undefined&&c.axis===c.HORIZONTAL_AXIS&&(h=0,g=-1*e),c.wheelDeltaY!==undefined&&(h=c.wheelDeltaY/120),c.wheelDeltaX!==undefined&&(g=-1*c.wheelDeltaX/120),d.unshift(b,e,g,h),(a.event.dispatch||a.event.handle).apply(this,d)}var b=["DOMMouseScroll","mousewheel"];if(a.event.fixHooks)for(var c=b.length;c;)a.event.fixHooks[b[--c]]=a.event.mouseHooks;a.event.special.mousewheel={setup:function(){if(this.addEventListener)for(var a=b.length;a;)this.addEventListener(b[--a],d,!1);else this.onmousewheel=d},teardown:function(){if(this.removeEventListener)for(var a=b.length;a;)this.removeEventListener(b[--a],d,!1);else this.onmousewheel=null}},a.fn.extend({mousewheel:function(a){return a?this.bind("mousewheel",a):this.trigger("mousewheel")},unmousewheel:function(a){return this.unbind("mousewheel",a)}})})(jQuery)


// ends plugin
    
jQuery(function($) {
    $('textarea')
        .bind('mousewheel', function(event, delta) {      
            if (this.scrollHeight && this.scrollHeight <= $(this).height() + $(this).scrollTop() && delta < 0)
            { 
               event.preventDefault()
                   } else if($(this).scrollTop()===0 &&  delta > 0){
                             event.preventDefault()
                           }
        });
});