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npm · #3366 most downloaded on npm
Convert modern CSS into something browsers understand
Last release 2 days ago
02 Oct 2026
Ships fairly regularly
a new release about every 2 weeks
Nearly every release is documented
notes for 60 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
9 years old
160 releases · first in 2017
Added css-blank-pseudo polyfill
December 12, 2018
css-blank-pseudo polyfillcss-has-pseudo polyfillautoprefixer to 9.4.2 (minor)browserslist to 4.3.5 (minor)caniuse-lite to 1.0.30000918 (patch)css-prefers-color-scheme to 3.1.1 (minor, patch for this project)cssdb to 4.3.0 (minor)postcss to 7.0.6 (patch)Fixed exportTo option to export Custom Media, Custom Properties, and Custom Selectors all to the same function, object, or file
November 6, 2018
exportTo option to export Custom Media, Custom Properties, and Custom
Selectors all to the same function, object, or filecss-prefers-color-scheme 3.0.0 (major, non-breaking for this project)cssdb to 4.2.0 (minor)One column per quarter.
Updated caniuse-lite to 1.0.30000905 (patch)
November 5, 2018
caniuse-lite to 1.0.30000905 (patch)postcss-custom-properties to 8.0.9 (patch)Added postcss-double-position-gradients 1.0.0 (major, non-breaking for this project)
October 28, 2018
postcss-double-position-gradients 1.0.0 (major, non-breaking for this project)autoprefixer to 9.3.1 (minor)browserslist to 4.3.4 (patch)caniuse-lite to 1.0.30000899 (patch)cssdb to 4.1.0 (major, non-breaking for this project)Updated autoprefixer to 9.2.1 (minor)
October 22, 2018
autoprefixer to 9.2.1 (minor)browserslist to 4.3.1 (minor)Updated browserslist to 4.2.1 (patch)
October 19, 2018
browserslist to 4.2.1 (patch)caniuse-lite to 1.0.30000893 (patch)postcss-custom-media to 7.0.7 (patch)Updated: postcss-custom-media to 7.0.6 (patch)
October 12, 2018
postcss-custom-media to 7.0.6 (patch)Added: Passing autoprefixer: false disables autoprefixer
October 10, 2018
postcss-color-grayautoprefixer: false disables autoprefixerbrowserslist to 4.2.0 (minor)caniuse-lite to 1.0.30000890 (patch)Updated: postcss-custom-properties to 8.0.8 (patch)
October 2, 2018
postcss-custom-properties to 8.0.8 (patch)Updated: browserslist to 4.1.2 (patch)
October 2, 2018
browserslist to 4.1.2 (patch)postcss to 7.0.5 (patch)postcss-custom-properties to 8.0.7 (patch)Updated: caniuse-lite to 1.0.30000888 (patch)
October 1, 2018
caniuse-lite to 1.0.30000888 (patch)postcss to 7.0.4 (patch)Did you hear? PostCSS Preset Env is now part of Create React App! 🎉
Updated: postcss to 7.0.3 (patch)
September 23, 2018
postcss to 7.0.3 (patch)postcss-custom-properties to 8.0.6 (patch)Updated: postcss-custom-media to 7.0.4 (patch)
September 23, 2018
postcss-custom-media to 7.0.4 (patch)Updated: postcss-color-mod-function to 3.0.3 (patch)
September 23, 2018
postcss-color-mod-function to 3.0.3 (patch)Updated: caniuse-lite to 1.0.30000887 (patch)
September 23, 2018
caniuse-lite to 1.0.30000887 (patch)postcss-color-mod-function to 3.0.2 (patch)Updated: caniuse-lite to 1.0.30000885 (patch)
September 21, 2018
caniuse-lite to 1.0.30000885 (patch)postcss-custom-properties to 8.0.5 (patch)Fixed: Do not break on an empty importFrom object
September 20, 2018
importFrom objectpostcss-env-functionFixed: Issue with the system-ui font family polyfill by replacing postcss-font-family-system-ui with an internal polyfill, at least until the problem
September 20, 2018
system-ui font family polyfill by replacing
postcss-font-family-system-ui with an internal polyfill, at least until the
problem with the original plugin is resolved.Added: Support for PostCSS Values Parser 2+
September 20, 2018
Updated: postcss-lab-function to v1.1.0 (minor update)
July 24, 2018
postcss-lab-function to v1.1.0 (minor update)Updated: postcss-color-mod-function to v2.4.3 (patch update)
July 21, 2018
postcss-color-mod-function to v2.4.3 (patch update)Updated: autoprefixer to v8.6.5 (patch update)
July 13, 2018
autoprefixer to v8.6.5 (patch update)caniuse-lite to v1.0.30000865 (patch update)postcss-color-functional-notation to v1.0.2 (patch update)Updated: caniuse-lite to v1.0.30000859 (patch update)
June 26, 2018
caniuse-lite to v1.0.30000859 (patch update)postcss-attribute-case-insensitive to v3.0.1 (patch update)Updated: autoprefixer to v8.6.3 (minor update)
June 25, 2018
autoprefixer to v8.6.3 (minor update)caniuse-lite to v1.0.30000858 (patch update)postcss to 6.0.23 (patch update)postcss-nesting to v6.0.0 (major internal update, non-breaking for this project)Added: autoprefixer option to pass options into autoprefixer
May 21, 2018
autoprefixer option to pass options into autoprefixerautoprefixer to v8.5.0 (minor update)browserslist to v3.2.8 (patch update)caniuse-lite to v1.0.30000844 (patch update)postcss-color-functional-notation to v1.0.1 (patch update)Added: postcss-color-functional-notation
May 11, 2018
autoprefixerpostcss-color-functional-notationpostcss-env-functionpostcss-lab-functionpostcss-placepostcss-gap-propertiespostcss-overflow-shorthandcssdb to v3.1.0 (major update)postcss-attribute-case-insensitive to v3.0.0 (major update)postcss-pseudo-class-any-link to v5.0.0 (major update)postcss-image-set-function to v2.0.0 (major update)postcss-dir-pseudo-class to v4.0.0 (major update)postcss-color-rebeccapurple to v3.1.0 (minor update)postcss to v6.0.22 (patch update)browserslist to v3.2.7 (patch update)caniuse-lite to v1.0.30000839 (patch update)All plugins now conform to the latest stable releases of postcss-value-parser
v1.5.0 and postcss-selector-parser v4.0.0.
Updated: browserslist to v3.2.5 (patch update)
April 23, 2018
browserslist to v3.2.5 (patch update)caniuse-lite to v1.0.30000830 (patch update)postcss-apply to v0.10.0 (minor update)postcss-nesting to v5.0.0 (major update, non-breaking for this project)Updated: postcss-focus-visible to v3.0.0 (major update)
April 7, 2018
postcss-focus-withinpostcss-focus-visible to v3.0.0 (major update)caniuse-lite to v1.0.30000824 (patch update)cssdb to v2.0.0 (major update)specificationId names to new id names for the cssdb update.Fixed: selectors-matches-pseudo mapping to allow :matches polyfilling
April 5, 2018
selectors-matches-pseudo mapping to allow :matches polyfillingpostcss-dir-pseudo-class to v3.0.0 (major update, non-breaking for this project)postcss-logical to v1.1.1 (minor update)postcss to v6.0.21 (patch update)browserslist to v3.2.4 (patch update)caniuse-lite to v1.0.30000823 (patch update)Updated: browserslist to v3.2.0 (minor update)
March 18, 2018
browserslist to v3.2.0 (minor update)postcss to v6.0.20 (patch update)postcss-image-set-polyfill to @csstools/postcss-image-set-function (hopefully temporarily)Updated: postcss-apply to v0.9.0 (minor update)
March 16, 2018
postcss-apply to v0.9.0 (minor update)browserslist to v3.1.2 (patch update)caniuse-lite to v1.0.30000815 (patch update)Updated: postcss-color-mod-function to v2.4.2 (patch update)
February 27, 2018
postcss-color-mod-function to v2.4.2 (patch update)Updated: Use the latest tested version of all dependencies
February 21, 2018
Added: postcss-page-break which has moved here from Autoprefixer
February 18, 2018
postcss-page-break which has moved here from Autoprefixer_February 17, 2018_ - Added: postcss-focus-visible
February 17, 2018
postcss-focus-visibleUpdated: postcss-color-mod-function to v2.4 (minor update)
February 16, 2018
postcss-color-mod-function to v2.4 (minor update)postcss-custom-properties to v7.0 (major update)Updated: browserslist to v3.1 (major update)
February 14, 2018
browserslist to v3.1 (major update)postcss-color-mod-function to v2.3 (minor update)Updated: cssdb to v1.5 (minor update)
January 22, 2018
cssdb to v1.5 (minor update)postcss-color-mod-function to v2.2 (major update)postcss-font-family-system-ui to v3.0 (repo update)_January 16, 2018_ - Initial version
January 16, 2018
Unsupported version accidentally published by a member of the community
December 20, 2017
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