30-seconds-of-code/transform-centering.md at 39b676c125bd7209bde7e897ef8e413544f7f703

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atomiks 39b676c125 Improve usage share count (#138 )

* Improve usage share

* Remove 'No caveats' note from all snippets

* Fix transform-centering usage: #search -> #feat

* transform -> transforms2d

* Add missing link for multiline truncate

2019-02-18 04:35:48 +11:00

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Transform centering

Vertically and horizontally centers a child element within its parent element using position: absolute and transform: translate() (as an alternative to flexbox or display: table). Similar to flexbox, this method does not require you to know the height or width of your parent or child so it is ideal for responsive applications.

HTML

<div class="parent"><div class="child">Centered content</div></div>

CSS

.parent {
  border: 1px solid #333;
  height: 250px;
  position: relative;
  width: 250px;
}

.child {
  left: 50%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

Demo

Explanation

position: absolute on the child element allows it to be positioned based on its containing block.
left: 50% and top: 50% offsets the child 50% from the left and top edge of its containing block.
transform: translate(-50%, -50%) allows the height and width of the child element to be negated so that it is vertically and horizontally centered.

Note: Fixed height and width on parent element is for the demo only.

Browser support

⚠️ Requires prefix for full support.

https://caniuse.com/#feat=transforms2d

1.3 KiB Raw Blame History