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postcss-filter-plugins

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postcss-filter-plugins

Exclude/warn on duplicated PostCSS plugins.


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What is postcss-filter-plugins?

The postcss-filter-plugins package is a PostCSS plugin that allows you to filter out other PostCSS plugins based on certain criteria. This can be useful for avoiding duplicate plugins, ensuring specific plugins are only applied once, or conditionally applying plugins based on certain conditions.

What are postcss-filter-plugins's main functionalities?

Filter out duplicate plugins

This feature allows you to filter out duplicate plugins from your PostCSS plugin list. In the example, the 'autoprefixer' plugin is included twice, but the filterPlugins function will exclude the duplicate.

const postcss = require('postcss');
const filterPlugins = require('postcss-filter-plugins');

const plugins = [
  require('autoprefixer'),
  require('autoprefixer'), // duplicate
  filterPlugins({
    exclude: ['autoprefixer']
  })
];

postcss(plugins).process(css).then(result => {
  console.log(result.css);
});

Conditionally apply plugins

This feature allows you to conditionally apply plugins based on custom logic. In the example, the 'autoprefixer' plugin is excluded if the NODE_ENV environment variable is set to 'production'.

const postcss = require('postcss');
const filterPlugins = require('postcss-filter-plugins');

const plugins = [
  require('autoprefixer'),
  filterPlugins({
    exclude: plugin => plugin.postcssPlugin === 'autoprefixer' && process.env.NODE_ENV === 'production'
  })
];

postcss(plugins).process(css).then(result => {
  console.log(result.css);
});

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Package last updated on 18 May 2018

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