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css/snippets/box-sizing-reset.md

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+---
+title: Box-sizing reset
+type: snippet
+tags: [layout]
+cover: interior
+dateModified: 2020-12-30T15:37:37+02:00
+---
+
+Resets the box-model so that `width` and `height` are not affected by `border` or `padding`.
+
+- Use `box-sizing: border-box` to include the width and height of `padding` and `border` when calculating the element's `width` and `height`.
+- Use `box-sizing: inherit` to pass down the `box-sizing` property from parent to child elements.
+
+```html
+<div class="box">border-box</div>
+<div class="box content-box">content-box</div>
+```
+
+```css
+div {
+  box-sizing: border-box;
+}
+
+*,
+*::before,
+*::after {
+  box-sizing: inherit;
+}
+
+.box {
+  display: inline-block;
+  width: 120px;
+  height: 120px;
+  padding: 8px;
+  margin: 8px;
+  background: #F24333;
+  color: white;
+  border: 1px solid #BA1B1D;
+  border-radius: 4px;
+}
+
+.content-box {
+  box-sizing: content-box;
+}
+```