CSS flex div get's larger as max-height

Issue

i got following HTML structure:

Demo here

<div id="wrapper">

  <div id="header">
    <i>Header</i>
  </div>
  
  <div id="content">
    <i>Content</i>
  </div>
  
  <div id="footer">
      <i>Footer</i>
  </div>

</div>

#wrapper{
  margin: 0;
  height: 100vh;
  max-height: 100vh;
  /* overflow: hidden; */
display: flex;
  flex-direction: column;
}

#header{
  background: blue;
  height: 3rem;
}

#content{
  background: red;
  flex-grow: 1;
}

#footer{
  background: green;
  height: 3rem;
}

My problem is that when the div of the content gets too large, the wrapper ignores his max-height and gets a scrollbar. What i want is that the content div instead gets the scrollbar and the wrapper holds it's height.

Demo of content to large

Solution

You have to make the wrapper overflow: hidden so scroll-bar is disabled for that div. Next, You can add the overflow: auto to content to make it scrollable if content goes outside.

#wrapper{
  margin: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: red;
  overflow: hidden;
}
#content{
  flex-grow: 1;
  overflow: auto;
}

Answered By - kazmi066