twitter-bootstrapcssflexboxflexboxgrid

Maintaing Height according to another Div

.col-6 h1 {
  color: white;
  text-align: center;
}
h1 {
  background-color: red;
}

.COL1, .COL2 {
  border: 1px solid red;
}
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<br></br>
<div class='container'>
  <div class='row'>
    <div class='col-6 COL1'>
      Lorem ipsum dolor sit amet consectetur adipiscing elit risus conubia ante, congue faucibus ac a non aptent nisi per commodo facilisi id, tempus lacus maecenas tincidunt mus sociosqu elementum ornare eget. Nascetur vestibulum hac tempor integer semper curae tempus etiam massa, platea fusce pellentesque aenean conubia at lectus non penatibus, nibh venenatis himenaeos scelerisque placerat imperdiet dignissim felis. Feugiat fames lectus magna aenean porttitor taciti hendrerit, integer facilisi nibh habitant dignissim sollicitudin aliquam, massa faucibus dictumst maecenas rhoncus sapien.
    </div>
    <div class='col-6 COL2'>
      <h1>ADVERTISE</h1>
      <div>Lorem ipsum dolor sit amet consectetur adipiscing elit risus conubia ante, congue faucibus ac a non aptent nisi per commodo facilisi id, tempus lacus maecenas tincidunt mus sociosqu elementum ornare eget. Nascetur vestibulum hac tempor integer semper curae tempus etiam massa, platea fusce pellentesque aenean conubia at lectus non penatibus, nibh venenatis himenaeos scelerisque placerat imperdiet dignissim felis. Feugiat fames lectus magna aenean porttitor taciti hendrerit, integer facilisi nibh habitant dignissim sollicitudin aliquam, massa faucibus dictumst maecenas rhoncus sapien.</div>
      <h1>ADVERTISE</h1>
    </div>
  </div>
</div>

Right Now this HTML is false like this

enter image description here

But What I want is to make Lorem ipsum text gets overflow:scroll To keep the Height of the COL2 equal to COL1 like this

enter image description here

And if the Lorem Ipsum text is too short not to make an overflow, Then it just gets over itself like this

enter image description here

keeping ADVERTISE at the BOTTOM as the Max-Height the Lorem Ipsum can reach.

Is that possible using Bootstrap or CSS without JS?

P.S. COL1 doesn't/can't have a Fixed-Height.

Solution

  • Add position:absolute to all child of your COL2 so it will can not make effect to COL2's height.

    .col-6 h1 {
  color: white;
  text-align: center;
}

h1 {
  background-color: red;
  position: absolute;
  left: 0;
  right: 0;
  height: 50px;
  margin: 0 !important;
}

.COL1,
.COL2 {
  border: 1px solid red;
}

.COL2 .top-banner {
  top: 0;
}

.COL2 .bottom-banner {
  bottom: 0;
}

.COL2 div {
  position: absolute;
  top: 50px;
  left: 0;
  bottom: 50px;
  right: 0;
  overflow: auto;
}
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<div class='container'>
  <div class='row'>
    <div class='col-6 COL1'>
      Lorem ipsum dolor sit amet consectetur adipiscing elit risus conubia ante, congue faucibus ac a non aptent nisi per commodo facilisi id, tempus lacus maecenas tincidunt mus sociosqu elementum ornare eget. Nascetur vestibulum hac tempor integer semper
      curae tempus etiam massa, platea fusce pellentesque aenean conubia at lectus non penatibus, nibh venenatis himenaeos scelerisque placerat imperdiet dignissim felis. Feugiat fames lectus magna aenean porttitor taciti hendrerit, integer facilisi nibh
      habitant dignissim sollicitudin aliquam, massa faucibus dictumst maecenas rhoncus sapien.
    </div>
    <div class='col-6 COL2'>
      <h1 class="top-banner">ADVERTISE</h1>
      <div>Lorem ipsum dolor sit amet consectetur adipiscing elit risus conubia ante, congue faucibus ac a non aptent nisi per commodo facilisi id, tempus lacus maecenas tincidunt mus sociosqu elementum ornare eget. Nascetur vestibulum hac tempor integer semper
        curae tempus etiam massa, platea fusce pellentesque aenean conubia at lectus non penatibus, nibh venenatis himenaeos scelerisque placerat imperdiet dignissim felis. Feugiat fames lectus magna aenean porttitor taciti hendrerit, integer facilisi
        nibh habitant dignissim sollicitudin aliquam, massa faucibus dictumst maecenas rhoncus sapien.</div>
      <h1 class="bottom-banner">ADVERTISE</h1>
    </div>
  </div>
</div>