JSFiddle - React, Tailwind, and code Playground

HTML

<div id="list">
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child<br />
        sometimes i span over several lines
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child<br />
        sometimes i span over several lines
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child<br />
        sometimes i span over several lines
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child<br />
        sometimes i span over several lines
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child<br />
        sometimes i span over several lines
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
        i am a lonely child
    </div>
    <div class="child">
      ...

CSS

#list {
    width: 500px;
    height: 300px;
    border: 1px solid blue;
    overflow: auto;
    overflow-x: hidden;
    padding: 10px;
}
.child {
    background: #ccc;
    padding: 1px 5px;
    margin: 1px 0;
}