JSFiddle - React, Tailwind, and code Playground

HTML

<div id="left">
    
    <div id="scrolWrapper">
        <div id="scrol" class="fixed">
            Navigation<br />
            &nbsp;-&nbsp;<a href="#1" class="scroll">Link One</a><br />
            &nbsp;-&nbsp;<a href="#2" class="scroll">Link Two</a><br />
            &nbsp;-&nbsp;<a href="#3" class="scroll">Link Three</a>
        </div>
    </div>
    
</div>

<div id="clear"></div>

CSS

body {
    padding: 0px;
    height:500px;
}

#sidebar {
    position: relative;
    padding: 20px
}

#left {
    width: 120px;
    height: 400px;
    border: 1px solid #000;
    float: left;
}

#right {
    width: 300px;
    height: 400px;
    border: 1px solid #000;
    float: left;
}

#scrolWrapper {
    margin-left: 0;
    position: absolute;
    left: 0;
    width: 100px;
}

#scrol.fixed {
    position: fixed;
    top: 100px;
    margin-bottom:40px;
}

#scrol {
    background-color: #E6E8EB;
    padding: 0 10px;
    width: 100px;
}


#clear {
    clear: both;
}