Issue
I'm trying to move the footer down 50px to go outta screen, but the negative margin doesn't work (nothing is moving) and I'm not quite sure why...
footer {
background: #111;
padding: 50px 0 100px;
text-align: center;
margin-bottom: -50px;
}
Here's an example
body {
background: white;
margin: 0;
}
section {
height: 100vh;
}
footer {
background: green;
padding: 50px 0 100px;
text-align: center;
color: white;
margin-bottom: -50px;
}<body>
<section>
Section 1
</section>
<section>
Section 2
</section>
<footer>
<div>
some content here
</div>
</footer>
</body>Solution
Negative margin is working fine but it's not doing what you are expecting. negative margin-bottom will not make the element to move outside. It will make the parent element to shrink instead.
Here is a simplifed example:
.box {
border:5px solid #000;
}
.box div{
background:red;
height:200px;
margin-bottom:-50px;
}<div class="box">
<div></div>
</div>As you can see the parent element has a height less than its child due to negative margin and we are having an overflow.
This is what is happening in your case, and since the overflow is by default scroll you will keep seeing the footer. Add some border and you will better see:
body {
background: white;
margin: 0;
border:2px solid;
}
section {
height: 100vh;
}
footer {
background: green;
padding: 50px 0 100px;
text-align: center;
color: white;
margin-bottom: -50px;
}<section>
Section 1
</section>
<section>
Section 2
</section>
<footer>
<div>
some content here
</div>
</footer>In order to hide the overflowing part, simply adjust the overflow property and you will have what you want:
html {
overflow:auto;
}
body {
background: white;
margin: 0;
border:2px solid;
overflow:hidden;
}
section {
height: 100vh;
}
footer {
background: green;
padding: 50px 0 100px;
text-align: center;
color: white;
margin-bottom: -200px;
}<section>
Section 1
</section>
<section>
Section 2
</section>
<footer>
<div>
some content here
</div>
</footer>As you can see, I have added a bigger negative margin to shrink more the body element and to make all the footer outside then I hide it using overflow:hidden
Answered By - Temani Afif
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