47 lines
828 B
Markdown
47 lines
828 B
Markdown
---
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title: Box-sizing reset
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tags: layout,beginner
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---
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Resets the box-model so that `width`s and `height`s are not affected by their `border`s or `padding`.
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```html
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<div class="box">border-box</div>
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<div class="box content-box">content-box</div>
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```
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```css
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html {
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box-sizing: border-box;
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}
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*,
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*::before,
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*::after {
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box-sizing: inherit;
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}
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.box {
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display: inline-block;
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width: 150px;
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height: 150px;
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padding: 10px;
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background: tomato;
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color: white;
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border: 10px solid red;
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}
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.content-box {
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box-sizing: content-box;
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}
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```
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#### Explanation
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1. `box-sizing: border-box` makes the addition of `padding` or `border`s not affect an element's `width` or `height`.
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2. `box-sizing: inherit` makes an element respect its parent's `box-sizing` rule.
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#### Browser support
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- https://caniuse.com/#feat=css3-boxsizing
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