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# [postcss][postcss]-merge-rules
> Merge CSS rules with PostCSS.
## Install
With [npm](https://npmjs.org/package/postcss-merge-rules) do:
```
npm install postcss-merge-rules --save
```
## Examples
This module will attempt to merge *adjacent* CSS rules:
### By declarations
#### Input
```css
a {
color: blue;
font-weight: bold
}
p {
color: blue;
font-weight: bold
}
```
#### Output
```css
a,p {
color: blue;
font-weight: bold
}
```
### By selectors
#### Input
```css
a {
color: blue
}
a {
font-weight: bold
}
```
#### Output
```css
a {
color: blue;
font-weight: bold
}
```
### By partial declarations
#### Input
```css
a {
font-weight: bold
}
p {
color: blue;
font-weight: bold
}
```
#### Output
```css
a,p {
font-weight: bold
}
p {
color: blue
}
```
## Usage
See the [PostCSS documentation](https://github.com/postcss/postcss#usage) for
examples for your environment.
## Contributors
See [CONTRIBUTORS.md](https://github.com/cssnano/cssnano/blob/master/CONTRIBUTORS.md).
## License
MIT © [Ben Briggs](http://beneb.info)
[postcss]: https://github.com/postcss/postcss