Achieve vertical center alignment of items using flexbox styling

I'm attempting to vertically center elements using CSS flexbox. I have successfully implemented it with the non-vendor-prefixed code, but I am facing issues in Webkit (Chrome) even with the vendor prefixes.

My goal is to vertically align the spans within #trigger.

Below is my current CSS:

#trigger{
    /* 2009 syntax */
    display: -webkit-box;
    display: box;
    /* current syntax */
    display: -webkit-flex;
    display: flex;
}

#trigger span{
    /* 2009 syntax */
    -webkit-box-align: center;
    /* current syntax */
    -webkit-align-items: center;
    flex-align: center;
}

Any suggestions on what could be causing the issue?

If you are familiar with other vendor prefixes or versions of the properties I am utilizing, please share them to ensure compatibility beyond just Webkit browsers.

cssflexbox

Answer №1

The CSS property align-items is specifically designed for use with flex containers, which are elements that have the style display: flex applied to them. It does not apply to flex items, which are the children of these flex containers. The older 2009 specification does not include a property equivalent to align-items; instead, the box-align property from 2009 corresponds to the modern standard spec's align-content.

http://jsfiddle.net/mnM5j/2/

#trigger {
  display: -webkit-flexbox;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-align: center;
  -ms-flex-align: center;
  -webkit-align-items: center;
  align-items: center;
  text-align: center;
  height: 10em;
  background: yellow;
}

<div id="trigger">
    <span>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus porta elit vel ante hendrerit facilisis. Curabitur aliquam sollicitudin diam, id posuere elit consectetur nec.</span>
</div>

Answer №2

To create a vertically aligned layout, you can use the following CSS properties. Please note that this example uses older syntax but has been tested on recent versions of Chrome, Firefox, and Firefox Aurora:

#trigger {
  width: 200px;
  height: 200px;

  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-box-pack: center;
  -webkit-box-align: center;

  display: -moz-box;
  -moz-box-orient: vertical;
  -moz-box-pack: center;
  -moz-box-align: center;

  display: box;
  box-orient: vertical;
  box-pack: center;
  box-align: center;
}

#trigger span {
  display: block;
}

The box-orient property determines how the children of the box are aligned in a vertical direction.

The box-pack property aligns the children along the vertical axis defined by box-orient.

The box-align property aligns the children inside the box perpendicular to the vertical axis, affecting horizontal alignment in this case since the box orientation is vertical.

For a visual demonstration, check out this Codepen demo. The additional CSS properties applied to the span elements besides display: block are purely for styling purposes.

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