How do I go about aligning the first row to the center vertically?

When I use the align-items-center class in the row section, it just doesn't seem to work as expected:

<div class="container">
    <div class="row align-items-center">
        <div class="col-12 bg-warning">
            hello
        </div>
    </div>
</div>

I am aiming for the line to be vertically centered on the page, similar to what is shown in this picture:

https://i.sstatic.net/aD1yj.png

Answer №1

Your code is functioning properly, but it will benefit from adding a specified height. Currently, the .container and .row are adjusting their height based on the content. To achieve vertical centering, you should set a height for the .row element:

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" rel="stylesheet"/>
<div class="container">
    <div class="row align-items-center" style="height:500px;">
        <div class="col-12 bg-warning">
            hello
        </div>
    </div>
</div>

To achieve vertical centering on the visible area of your website, consider using height:100vh; instead of a fixed size.

Answer №2

To ensure the entire page takes up the full height, you must make it occupy 100% height.

html, body, .container, .row {
  height: 100%;
}

Answer №3

Give this a shot: https://jsfiddle.net/q1ypnzg8/2/

<div class="container divouter">
    <div class="row align-items-center divmiddle">
        <div class="col-12 bg-warning divinner">
            hey there
        </div>
    </div>
</div>

CSS

.divouter {
    display: table;
    position: absolute;
    height: 100%;
    width: 100%;
}

.divmiddle {
    display: table-cell;
    vertical-align: middle;
}

.divinner {
    margin-left: auto;
    margin-right: auto; 
    text-align: center;
}

Answer №4

When it comes to centering text in CSS, there are some limitations. To ensure browser compatibility, it is recommended to use the inline alignment property.

<div align="center">Content goes here.</div>

Other options to consider in CSS for centering text are:

#divID{ margin:auto text-align: center;

}

However, using the margin auto property is preferred as text align may not work in certain browsers for specific tags.

Answer №5

If you want to center align items in a row, you can use the following CSS code for .row.align-items-center:

.row.align-items-center {
    position: absolute;
    transform: translate(-50%, -50%);
    -webkit-transform: translate(-50%, -50%);
    -moz-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    top: 50%;
    left: 50%;
}

Feel free to give this a try. Happy coding!

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