42 lines
1.3 KiB
Markdown
42 lines
1.3 KiB
Markdown
---
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title: Transform centering
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tags: layout
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---
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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.
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```html
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<div class="parent"><div class="child">Centered content</div></div>
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```
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```css
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.parent {
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border: 1px solid #333;
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height: 250px;
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position: relative;
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width: 250px;
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}
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.child {
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left: 50%;
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position: absolute;
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top: 50%;
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transform: translate(-50%, -50%);
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text-align: center;
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}
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```
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#### Explanation
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1. `position: absolute` on the child element allows it to be positioned based on its containing block.
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2. `left: 50%` and `top: 50%` offsets the child 50% from the left and top edge of its containing block.
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3. `transform: translate(-50%, -50%)` allows the height and width of the child element to be negated so that it is vertically and horizontally centered.
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- Note: that the fixed height and width on parent element is for the demo only.
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#### Browser support
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<span class="snippet__support-note">⚠️ Requires prefix for full support.</span>
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- https://caniuse.com/#feat=transforms2d
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