Vertical Align Center in Bootstrap 4
I am trying to center my Container in the middle of the page using Bootstrap 4. I have been unsuccessful thus far. Any help would be appreciated.
I have built it at Codepen.io so you guys can play with it and let me know what works as I am about out of ideas...
Edit - [ANSWER]
Adding the following to the top of my CSS fixed the problem:
html, body {
height:100%;
}
body {
display:flex;
align-items:center;
}
Also, in Bootstrap 4 (alpha):
Adding the classes d-flex align-items-center h-100 to the parent also solves the problem and is a more Bootstrappy approach. Note this does the same thing as the aforementioned approach.
Solved thanks to @Pete, @ZimSystems as well as others
Important! Vertical center is relative to the height of the parent
If the parent of the element your trying to center has no defined height , none of the vertical centering solutions will work!
Now, onto vertical centering in Bootstrap 4...
You can use the new flexbox & size utilities to make the container full-height and display: flex . These options don't require extra CSS (except that the height of the container (ie:html,body) must be 100% ).
Option 1 align-self-center on flexbox child
<div class="container d-flex h-100">
<div class="row justify-content-center align-self-center">
I'm vertically centered
</div>
</div>
https://www.codeply.com/go/fFqaDe5Oey
Option 2 align-items-center on flexbox parent ( .row is display:flex; flex-direction:row )
<div class="container h-100">
<div class="row align-items-center h-100">
<div class="col-6 mx-auto">
<div class="jumbotron">
I'm vertically centered
</div>
</div>
</div>
</div>
https://www.codeply.com/go/BumdFnmLuk
Option 3 justify-content-center on flexbox parent ( .card is display:flex;flex-direction:column )
<div class="container h-100">
<div class="row align-items-center h-100">
<div class="col-6 mx-auto">
<div class="card h-100 border-primary justify-content-center">
<div>
...card content...
</div>
</div>
</div>
</div>
</div>
https://www.codeply.com/go/3gySSEe7nd
More on Bootstrap 4 Vertical Centering
Now that Bootstrap 4 offers flexbox and other utilities, there are many approaches to vertical alignment. http://www.codeply.com/go/WG15ZWC4lf
1 - Vertical Center Using Auto Margins:
Another way to vertically center is to use my-auto . This will center the element within it's container. For example, h-100 makes the row full height, and my-auto will vertically center the col-sm-12 column.
<div class="row h-100">
<div class="col-sm-12 my-auto">
<div class="card card-block w-25">Card</div>
</div>
</div>
Vertical Center Using Auto Margins Demo
my-auto represents margins on the vertical y-axis and is equivalent to:
margin-top: auto;
margin-bottom: auto;
2 - Vertical Center with Flexbox:
Since Bootstrap 4 .row is now display:flex you can simply use align-self-center on any column to vertically center it...
<div class="row">
<div class="col-6 align-self-center">
<div class="card card-block">
Center
</div>
</div>
<div class="col-6">
<div class="card card-inverse card-danger">
Taller
</div>
</div>
</div>
or, use align-items-center on the entire .row to vertically center align all col-* in the row...
<div class="row align-items-center">
<div class="col-6">
<div class="card card-block">
Center
</div>
</div>
<div class="col-6">
<div class="card card-inverse card-danger">
Taller
</div>
</div>
</div>
Vertical Center Different Height Columns Demo
3 - Vertical Center Using Display Utils:
Bootstrap 4 has display utils that can be used for display:table , display:table-cell , display:inline , etc.. These can be used with the vertical alignment utils to align inline, inline-block or table cell elements.
<div class="row h-50">
<div class="col-sm-12 h-100 d-table">
<div class="card card-block d-table-cell align-middle">
I am centered vertically
</div>
</div>
</div>
Vertical Center Using Display Utils Demo
More examples
Vertical center image in <div>
Vertical center .row in .container
Vertical center and bottom in <div>
Vertical center child inside parent
Vertical center full screen jumbotron
Important! Did I mention height?
Remember vertical centering is relative to the height of the parent element. If you want to center on the entire page, in most cases, this should be your CSS...
body,html {
height: 100%;
}
If you want to center a child element inside the parent. The parent must have a defined height .
Also see:
Vertical alignment in bootstrap 4
Bootstrap 4. Center Vertical and Horizontal Alignment
you can vertically align your container by making the parent container flex and adding align-items:center :
body {
display:flex;
align-items:center;
}
Updated Pen
.jumbotron {
position: relative;
top: 50%;
transform: translateY(-50%);
}
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