viewport height in bootstrap css code example
Example 1: bootstrap height 100vh class
<div class="container-fluid vh-100"></div>
Example 2: bootstrap height and width sizes
<div style="height: 100px; background-color: rgba(255,0,0,0.1);">
<div class="mh-100" style="width: 100px; height: 200px; background-color: rgba(0,0,255,0.1);">Max-height 100%</div>
</div>