Two divs scrolling independently - html

Question

I need help to make these two <div>'s (#side-nav and #content-wrapper) to scroll independently,
HTML:
<div id="wrapper">
<div id="top-nav">
Top nav
</div>
<div id="side-nav">
<ul>
<li>Thing</li>
<li>Thing</li>
</ul>
</div>
<div id="content-wrapper">
<!-- Ton of conent here -->
</div>
</div>
CSS:
#wrapper {
width: 100%;
background-color: #fff;
}
#top-nav {
position: fixed;
top: 0;
height: 60px;
width: 100%;
background-color: green;
}
#side-nav {
position: fixed;
width: 250px;
height:100vh;
overflow-y: scroll;
background-color: red;
}
#content-wrapper {
margin: 60px 0 0 250px;
padding: 0 30px;
overflow-y: scroll;
background-color: blue;
}
now if I scroll the #side-nav to the end or top, #content-wrapper will scroll too. #side-nav has to stay full-page height and fixed even if there is not that many <li>'s.
I've quickly made pen here:
http://codepen.io/blizqery/pen/QbZzRN
Thanks!

Answer 1

Check this: http://codepen.io/anon/pen/xGyMjM
You need to set height to content-wrapper, and also set the left, right & top.
#side-nav {
position: fixed;
width: 250px;
height:100vh;
left: 0;
right: 0;
overflow-y: scroll;
background-color: red;
top: 60px;
}
#content-wrapper {
margin: 60px 0 0 250px;
padding: 0 30px;
overflow-y: scroll;
position: fixed;
left: 0;
top: 0;
height:100vh;
background-color: blue;
}

Answer 2

I believe this works for your issue
body{
margin:0px;
}
#top-nav {
position: fixed;
top: 0;
height: 10vh;
width: 100%;
background-color: green;
}
#wrapper {
width: 100%;
background-color: #fff;
}
#side-nav {
float:left;
width: 250px;
height: 90vh;
overflow-y: scroll;
background-color: red;
}
#content-wrapper {
margin: 10vh 0 0 250px;
padding: 0 30px;
overflow-y: scroll;
background-color: blue;
height:90vh;
}