Hover Text (FlexBox)

HTML

<script src="http://code.jquery.com/jquery-1.12.0.min.js"></script>
<div class="container">

    <div class="bar">
        Small
    </div>

    <div class="content">

        <div>Static content</div>
        <div class="scroll"></div>
        <div>Static content</div>

    </div>

    <div class="footer">
        Small
    </div>


</div>

CSS

body,
html {
    margin: 0;
    padding: 0;
}

.container {
    box-sizin: border-box;
    position: absolute;
    height: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
}

.content {
    background: yellow;
    flex: 1;
    display: flex;
    flex-direction: column;
    
    min-height: 0;           /* NEW */
    min-width: 0;            /* NEW */
}

.scroll {
    flex: 1 1 auto;
    overflow: scroll;
}

JavaScript

for (var i = 0; i < 100; i++)
    $(".scroll").append("Dynamic content<br>");