JSFiddle - React, Tailwind, and code Playground

HTML

<div class="b">
    <div class="a"></div>
</div>

<div class="a2">
    <div class="b">
        <div class="a"></div>
    </div>
</div>

CSS

.b {
    border: 5px solid red;
    overflow: hidden;
    margin-bottom: 5px;
}
.a {
    margin: -5px;
    height: 20px;
    background: blue;
}
.a2 .b {
    overflow: visible;
}