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# unit-whitelist
Specify a whitelist of allowed units.
```css
a { width: 100px; }
/** ↑
* These units */
```
## Options
`array|string`: `["array", "of", "units"]|"unit"`
Given:
```js
["px", "em", "deg"]
```
The following patterns are considered violations:
```css
a { width: 100%; }
```
```css
a { font-size: 10rem; }
```
```css
a { animation: animation-name 5s ease; }
```
The following patterns are *not* considered violations:
```css
a { font-size: 1.2em; }
```
```css
a { line-height: 1.2; }
```
```css
a { height: 100px; }
```
```css
a { height: 100PX; }
```
```css
a { transform: rotate(30deg); }
```
## Optional secondary options
### `ignoreProperties: { unit: ["property", "/regex/", /regex/] }`
Ignore units in the values of declarations with the specified properties.
For example, with `["px", "em"]`.
Given:
```js
{
"rem": [ "line-height", "/^border/" ],
"%": [ "width" ]
}
```
The following patterns are *not* considered violations:
```css
a { line-height: 0.1rem; }
```
```css
a { border-bottom-width: 6rem; }
```
```css
a { width: 100%; }
```
The following patterns are considered violations:
```css
a { margin: 0 20rem; }
```
```css
a { -moz-border-radius-topright: 20rem; }
```
```css
a { height: 100%; }
```
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