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Flexible Height Explanation #28

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Flexible Height Explanation
Dec 19, 2015
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Fix Typo
Dec 19, 2015
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Update README.md
Dec 19, 2015
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20 changes: 18 additions & 2 deletions README.md
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Expand Up @@ -14,7 +14,8 @@ A collection of tips to help take your CSS skills pro.
1. [Equal Width Table Cells](#equal-width-table-cells)
1. [Get Rid of Margin Hacks With Flexbox](#get-rid-of-margin-hacks-with-flexbox)
1. [Use Attribute Selectors with Empty Links](#use-attribute-selectors-with-empty-links)
1. [Style "Default" Links](#style-default-links)
1. [Style "Default" Links](#style-default-links)
1. [Use % height on elements](#percent-height)


### Use `:not()` to Apply/Unapply Borders on Navigation
Expand Down Expand Up @@ -254,7 +255,22 @@ a[href]:not([class]) {

Now links that are inserted via a CMS, which don't usually have a `class` attribute, will have a distinction without generically affecting the cascade.

### Percent Height

For apply a flexible height (in percent) to a element in HTML, you need that a parent element have a **fixed** height, something like:

```css
.my-outer-element {
height : 100px
}

.my-outer-element > .my-inner-element {
height : 50%
}
```

Now we have `.my-outer-element` with **100px** of height, and a `.my-inner-element` that will have **50%** of the parent element height, so **50px**.

### Support

These protips work in current versions of Chrome, Firefox, Safari, and Edge, and in IE11.
These protips work in current versions of Chrome, Firefox, Safari, and Edge, and in IE11.