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