JSFiddle - React, Tailwind, and code Playground

HTML

<div class="slider_wrapper">
        <div class="slider_container">
        <div class="scroll-content">
        
            <div class="scroll-content-item">
            <h2>Event Header</h2>

            <p>The event content goes here.</p>
            <a href="">Book Now</a>
            </div>
            
            <div class="scroll-content-item">
            <h2>Event Header</h2>
            <p>The event content goes here.</p>
            <a href="">Book Now</a>

            </div>
            
            <div class="scroll-content-item">
            <h2>Event Header</h2>
            <p>The event content goes here.</p>
            <a href="">Book Now</a>
            </div>
            
            <div class="scroll-content-item">

            <h2>Event Header</h2>
            <p>The event content goes here.</p>
            <a href="">Book Now</a>
            </div>
            
            <div class="scroll-content-item">
            <h2>Event Header</h2>
            <p>The event content goes here.</p>

            <a href="">Book Now</a>
            </div>
            
            <div class="scroll-content-item">
            <h2>Event Header</h2>
            <p>The event content goes here.</p>
            <a href="">Book Now</a>
            </div>

            
            <div class="scroll-content-item">
            <h2>Event Header</h2>
            <p>The event content goes here.</p>
            <a href="">Book Now</a>
            </div>
            
            <div class="scroll-content-item">
            <h2>Event Header</h2>

            <p>The event content goes here.</p>
            <a href="">Book Now</a>
            </div>
            
            <div class="scroll-content-item">
            <h2>Event Header</h2>
            <p>The event content goes here.</p>
            <a href="">Book Now</a>

            </div>
            
            <div class="scroll-content-item">
            <h2>Event Header</h2>
            <p>The event content...

CSS

/*
 * jQuery UI CSS Framework 1.8.15
 *
 * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Theming/API
 */

/* Layout helpers
----------------------------------*/
.ui-helper-hidden { display: none; }
.ui-helper-hidden-accessible { position: absolute !important; clip: rect(1px 1px 1px 1px); clip: rect(1px,1px,1px,1px); }
.ui-helper-reset { margin: 0; padding: 0; border: 0; outline: 0; line-height: 1.3; text-decoration: none; font-size: 100%; list-style: none; }
.ui-helper-clearfix:after { content: "."; display: block; height: 0; clear: both; visibility: hidden; }
.ui-helper-clearfix { display: inline-block; }
/* required comment for clearfix to work in Opera \*/
* html .ui-helper-clearfix { height:1%; }
.ui-helper-clearfix { display:block; }
/* end clearfix */
.ui-helper-zfix { width: 100%; height: 100%; top: 0; left: 0; position: absolute; opacity: 0; filter:Alpha(Opacity=0); }


/* Interaction Cues
----------------------------------*/
.ui-state-disabled { cursor: default !important; }


/* Icons
----------------------------------*/

/* states and images */
.ui-icon { display: block; text-indent: -99999px; overflow: hidden; background-repeat: no-repeat; }


/* Misc visuals
----------------------------------*/

/* Overlays */
.ui-widget-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }


/*
 * jQuery UI CSS Framework 1.8.15
 *
 * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Theming/API
 *
 * To view and modify this theme, visit...

JavaScript

$(function () {
    var scrollPane = $(".slider_container");
    var scrollContent = $(".scroll-content");

    // Slider

    $('#slider').slider({
        orientation: "vertical",
        value: 100,
        slide: function (event, ui) {
            console.log(ui.value);
            console.log(scrollPane.height());

            if (scrollContent.height() > scrollPane.height()) {
                scrollContent.css("margin-top", (-1 * (scrollPane.height() - ((scrollPane.height() * ui.value) / 100))) + "px");

            } else {
                scrollContent.css("margin-top", 100);
            }
        }
    });
});