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https://github.com/postcss/gulp-postcss
Pipe CSS through PostCSS processors with a single parse
https://github.com/postcss/gulp-postcss
gulp-plugin javascript postcss
Last synced: about 2 months ago
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Pipe CSS through PostCSS processors with a single parse
- Host: GitHub
- URL: https://github.com/postcss/gulp-postcss
- Owner: postcss
- License: mit
- Created: 2014-08-17T13:39:32.000Z (about 10 years ago)
- Default Branch: main
- Last Pushed: 2024-02-06T10:48:07.000Z (8 months ago)
- Last Synced: 2024-04-14T02:32:51.535Z (5 months ago)
- Topics: gulp-plugin, javascript, postcss
- Language: JavaScript
- Homepage:
- Size: 104 KB
- Stars: 771
- Watchers: 19
- Forks: 73
- Open Issues: 5
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# gulp-postcss
[](https://coveralls.io/r/postcss/gulp-postcss)
[PostCSS](https://github.com/postcss/postcss) gulp plugin to pipe CSS through
several plugins, but parse CSS only once.
## Install
$ npm install --save-dev postcss gulp-postcss
Install required [postcss plugins](https://www.npmjs.com/browse/keyword/postcss-plugin) separately. E.g. for autoprefixer, you need to install [autoprefixer](https://github.com/postcss/autoprefixer) package.
## Basic usage
The configuration is loaded automatically from `postcss.config.js`
as [described here](https://www.npmjs.com/package/postcss-load-config),
so you don't have to specify any options.
```js
var postcss = require('gulp-postcss');
var gulp = require('gulp');
gulp.task('css', function () {
return gulp.src('./src/*.css')
.pipe(postcss())
.pipe(gulp.dest('./dest'));
});
```
## Passing plugins directly
```js
var postcss = require('gulp-postcss');
var gulp = require('gulp');
var autoprefixer = require('autoprefixer');
var cssnano = require('cssnano');
gulp.task('css', function () {
var plugins = [
autoprefixer({browsers: ['last 1 version']}),
cssnano()
];
return gulp.src('./src/*.css')
.pipe(postcss(plugins))
.pipe(gulp.dest('./dest'));
});
```
## Using with .pcss extension
For using gulp-postcss to have input files in .pcss format and get .css output need additional library like gulp-rename.
```js
var postcss = require('gulp-postcss');
var gulp = require('gulp');
const rename = require('gulp-rename');
gulp.task('css', function () {
return gulp.src('./src/*.pcss')
.pipe(postcss())
.pipe(rename({
extname: '.css'
}))
.pipe(gulp.dest('./dest'));
});
```
This is done for more explicit transformation. According to [gulp plugin guidelines](https://github.com/gulpjs/gulp/blob/master/docs/writing-a-plugin/guidelines.md#guidelines)
> Your plugin should only do one thing, and do it well.
## Passing additional options to PostCSS
The second optional argument to gulp-postcss is passed to PostCSS.
This, for instance, may be used to enable custom parser:
```js
var gulp = require('gulp');
var postcss = require('gulp-postcss');
var nested = require('postcss-nested');
var sugarss = require('sugarss');
gulp.task('default', function () {
var plugins = [nested];
return gulp.src('in.sss')
.pipe(postcss(plugins, { parser: sugarss }))
.pipe(gulp.dest('out'));
});
```
If you are using a `postcss.config.js` file, you can pass PostCSS options as the first argument to gulp-postcss.
This, for instance, will let PostCSS know what the final file destination path is, since it will be unaware of the path given to `gulp.dest()`:
```js
var gulp = require('gulp');
var postcss = require('gulp-postcss');
gulp.task('default', function () {
return gulp.src('in.scss')
.pipe(postcss({ to: 'out/in.css' }))
.pipe(gulp.dest('out'));
});
```
## Using a custom processor
```js
var postcss = require('gulp-postcss');
var cssnext = require('postcss-cssnext');
var opacity = function (css, opts) {
css.walkDecls(function(decl) {
if (decl.prop === 'opacity') {
decl.parent.insertAfter(decl, {
prop: '-ms-filter',
value: '"progid:DXImageTransform.Microsoft.Alpha(Opacity=' + (parseFloat(decl.value) * 100) + ')"'
});
}
});
};
gulp.task('css', function () {
var plugins = [
cssnext({browsers: ['last 1 version']}),
opacity
];
return gulp.src('./src/*.css')
.pipe(postcss(plugins))
.pipe(gulp.dest('./dest'));
});
```
## Source map support
Source map is disabled by default, to extract map use together
with [gulp-sourcemaps](https://github.com/floridoo/gulp-sourcemaps).
```js
return gulp.src('./src/*.css')
.pipe(sourcemaps.init())
.pipe(postcss(plugins))
.pipe(sourcemaps.write('.'))
.pipe(gulp.dest('./dest'));
```
## Advanced usage
If you want to configure postcss on per-file-basis, you can pass a callback
that receives [vinyl file object](https://github.com/gulpjs/vinyl) and returns
`{ plugins: plugins, options: options }`. For example, when you need to
parse different extensions differntly:
```js
var gulp = require('gulp');
var postcss = require('gulp-postcss');
gulp.task('css', function () {
function callback(file) {
return {
plugins: [
require('postcss-import')({ root: file.dirname }),
require('postcss-modules')
],
options: {
parser: file.extname === '.sss' ? require('sugarss') : false
}
}
}
return gulp.src('./src/*.css')
.pipe(postcss(callback))
.pipe(gulp.dest('./dest'));
});
```
The same result may be achieved with
[`postcss-load-config`](https://www.npmjs.com/package/postcss-load-config),
because it receives `ctx` with the context options and the vinyl file.
```js
var gulp = require('gulp');
var postcss = require('gulp-postcss');
gulp.task('css', function () {
var contextOptions = { modules: true };
return gulp.src('./src/*.css')
.pipe(postcss(contextOptions))
.pipe(gulp.dest('./dest'));
});
```
```js
// postcss.config.js or .postcssrc.js
module.exports = function (ctx) {
var file = ctx.file;
var options = ctx;
return {
parser: file.extname === '.sss' ? : 'sugarss' : false,
plugins: {
'postcss-import': { root: file.dirname }
'postcss-modules': options.modules ? {} : false
}
}
};
```
## Changelog
* 10.0.0
* Released with the same changes as 9.1.0
* 9.1.0 **deprecated, because it breaks semver by dropping support for node <18**
* Bump postcss-load-config to ^5.0.0
* Ensure options are passed to plugins when using postcss.config.js #170
* Update deps
* Drop support for node <18
* Add flake.nix for local dev with `nix develop`
* 9.0.1
* Bump postcss-load-config to ^3.0.0
* 9.0.0
* Bump PostCSS to 8.0
* Drop Node 6 support
* PostCSS is now a peer dependency
* 8.0.0
* Bump PostCSS to 7.0
* Drop Node 4 support
* 7.0.1
* Drop dependency on gulp-util
* 7.0.0
* Bump PostCSS to 6.0
* Smaller module size
* Use eslint instead of jshint
* 6.4.0
* Add more details to `PluginError` object
* 6.3.0
* Integrated with postcss-load-config
* Added a callback to configure postcss on per-file-basis
* Dropped node 0.10 support
* 6.2.0
* Fix syntax error message for PostCSS 5.2 compatibility
* 6.1.1
* Fixed the error output
* 6.1.0
* Support for `null` files
* Updated dependencies
* 6.0.1
* Added an example and a test to pass options to PostCSS (e.g. `syntax` option)
* Updated vinyl-sourcemaps-apply to 0.2.0
* 6.0.0
* Updated PostCSS to version 5.0.0
* 5.1.10
* Use autoprefixer in README
* 5.1.9
* Prevent unhandled exception of the following pipes from being suppressed by Promise
* 5.1.8
* Prevent stream’s unhandled exception from being suppressed by Promise
* 5.1.7
* Updated direct dependencies
* 5.1.6
* Updated `CssSyntaxError` check
* 5.1.4
* Simplified error handling
* Simplified postcss execution with object plugins
* 5.1.3 Updated travis banner
* 5.1.2 Transferred repo into postcss org on github
* 5.1.1
* Allow override of `to` option
* 5.1.0 PostCSS Runner Guidelines
* Set `from` and `to` processing options
* Don't output js stack trace for `CssSyntaxError`
* Display `result.warnings()` content
* 5.0.1
* Fix to support object plugins
* 5.0.0
* Use async API
* 4.0.3
* Fixed bug with relative source map
* 4.0.2
* Made PostCSS a simple dependency, because peer dependency is deprecated
* 4.0.1
* Made PostCSS 4.x a peer dependency
* 4.0.0
* Updated PostCSS to 4.0
* 3.0.0
* Updated PostCSS to 3.0 and fixed tests
* 2.0.1
* Added Changelog
* Added example for a custom processor in README
* 2.0.0
* Disable source map by default
* Test source map
* Added Travis support
* Use autoprefixer-core in README
* 1.0.2
* Improved README
* 1.0.1
* Don't add source map comment if used with gulp-sourcemaps
* 1.0.0
* Initial release