JSFiddle - React, Tailwind, and code Playground

by Stallman41

HTML

<table border="1">
    <thead>
        <tr>
            <th width="200">Month</th>
            <th>Savings</th>
        </tr>
    </thead>
    <tfoot>
        <tr>
            <td>Sum</td>
            <td>$180</td>
        </tr>
    </tfoot>
    <tbody>
        <tr>
            <td colspan="2">
        <div class="scrollit">
            <table>
                <tr>
                    <td width="200">January</td>
                    <td>$100</td>
                </tr>
                <tr>
                    <td>February</td>
                    <td>$80</td>
                </tr>
                <tr>
                    <td>January</td>
                    <td>$100</td>
                </tr>
                <tr>
                    <td>February</td>
                    <td>$80</td>
                </tr>
                <tr>
                    <td>January</td>
                    <td>$100</td>
                </tr>
                <tr>
                    <td>February</td>
                    <td>$80</td>
                </tr>
                <tr>
                    <td>January</td>
                    <td>$100</td>
                </tr>
                <tr>
                    <td>February</td>
                    <td>$80</td>
                </tr>
                <tr>
                    <td>January</td>
                    <td>$100</td>
                </tr>
                <tr>
                    <td>February</td>
                    <td>$80</td>
                </tr>
                <tr>
                    <td>January</td>
                    <td>$100</td>
                </tr>
                <tr>
                    <td>February</td>
                    <td>$80</td>
                </tr>
                <tr>
                    <td>January</td>
                    <td>$100</td>
                </tr>
                <tr>
                    <td>February</td>
                    <td>$80</td>
                </tr>
                <tr>
                   ...

CSS

tbody div{
    overflow:scroll;
    height:100px;
}