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# [postcss][postcss]-discard-comments
> Discard comments in your CSS files with PostCSS.
## Install
With [npm](https://npmjs.org/package/postcss-discard-comments) do:
``` npm install postcss-discard-comments --save ```
## Example
### Input
```css h1/* heading */{ margin: 0 auto } ```
### Output
```css h1 { margin: 0 auto } ```
This module discards comments from your CSS files; by default, it will remove all regular comments (`/* comment */`) and preserve comments marked as important (`/*! important */`).
Note that this module does not handle source map comments because they are not available to it; PostCSS handles this internally, so if they are removed then you will have to [configure source maps in PostCSS][maps].
[maps]: https://github.com/postcss/postcss/blob/master/docs/source-maps.md
## API
### comments([options])
#### options
##### remove(function)
Type: `function` Return: `boolean` Variable: `comment` contains a comment without `/**/`
For each comment, return true to remove, or false to keep the comment.
```js function(comment) {} ```
```js var css = '/* headings *//*@ h1 */h1{margin:0 auto}/*@ h2 */h2{color:red}'; console.log(postcss(comments({ remove: function(comment) { return comment[0] == "@"; } })).process(css).css); //=> /* headings */h1{margin:0 auto}h2{color:red} ``` **NOTE:** If you use the `remove` function other options will not be available.
##### removeAll
Type: `boolean` Default: `false`
Remove all comments marked as important.
```js var css = '/*! heading */h1{margin:0 auto}/*! heading 2 */h2{color:red}'; console.log(postcss(comments({removeAll: true})).process(css).css); //=> h1{margin:0 auto}h2{color:red} ```
##### removeAllButFirst
Type: `boolean` Default: `false`
Remove all comments marked as important, but the first one.
```js var css = '/*! heading */h1{margin:0 auto}/*! heading 2 */h2{color:red}'; console.log(postcss(comments({removeAllButFirst: true})).process(css).css); //=> /*! heading */h1{margin:0 auto}h2{color:red} ```
## 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
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