bootstrap 4 table height scroll code example

Example 1: bootstrap table col fixed width

<table class="table">
  <thead>
    <tr>
      <th style="width: 30%">Col 1</th>
      <th style="width: 20%">Col 2</th>
      <th style="width: 10%">Col 3</th>
      <th style="width: 30%">Col 4</th>
      <th style="width: 10%">Col 5</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Val 1</td>
      <td>Val 2</td>
      <td>Val 3</td>
      <td>Val 4</td>
      <td>Val 5</td>
    </tr>
  </tbody>
</table>

Example 2: how to set the scroll in bootstrap4 table body

table {
    display: flex;
    flex-flow: column;
    width: 100%;
}

thead {
    flex: 0 0 auto;
}

tbody {
    flex: 1 1 auto;
    display: block;
    overflow-y: auto;
    overflow-x: hidden;
}

tr {
    width: 100%;
    display: table;
    table-layout: fixed;
}