JSFiddle - React, Tailwind, and code Playground

HTML

<div class="dialogOverlay" data-bind="visible: isOpen">
    <div class="dialogBase">
        <div class="bodyContent" data-bind="compinent: { name: bodyContentComponentName , params: bodyContentComponentParams}">
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body content, Body Content</h1>
            <p>body content</p>
            <h1>Body...

CSS

.dialogOverlay {
    z-index: 600;
    position: absolute;
    left: 0;
    top: 0;
    height: 100vh;
    width: 100vw;
    background-color: rgba(0, 0, 0, 0.4);
    display: flex;
    justify-content: center;
    align-items: center;
}

.dialogBase {
    position: relative;
    min-width: 120px;
    max-width: 75%;
    overflow: hidden;
    height: 500px;
    background-color: white;
    border: 1px solid black;
    margin: 10px;
    z-index: 601;
}

.bodyContent {
    background-color: yellow;
    overflow-y: scroll;
    height: 100%;
}