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postcss
autoprefixer
JavaScript2013–2019
postcss / autoprefixer

autoprefixer

Parse CSS and add vendor prefixes to rules by Can I Use

Web Development
Explore on GitHubRead Hacker News discussions
18Distinct people
30Mentions
0Explicit recommenders
22.2KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Parse CSS and add vendor prefixes to rules by Can I Use

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

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Also in these discussions

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This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 12:54:37 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year30 dated mentions

Observed mentions: 2013-04-16 20:09:54 UTC to 2019-09-12 16:20:59 UTC.

02468102013-01-01 00:00:00 UTC to 2014-01-01 00:00:00 UTC (exclusive): 7 mentions; 4 submissions, 3 comments20132014-01-01 00:00:00 UTC to 2015-01-01 00:00:00 UTC (exclusive): 5 mentions; 2 submissions, 3 comments2015-01-01 00:00:00 UTC to 2016-01-01 00:00:00 UTC (exclusive): 9 mentions; 3 submissions, 6 comments2016-01-01 00:00:00 UTC to 2017-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments20162017-01-01 00:00:00 UTC to 2018-01-01 00:00:00 UTC (exclusive): 4 mentions; 1 submissions, 3 comments2018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 1 mentions; 1 submissions, 0 comments2019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 2 mentions; 1 submissions, 1 comments2019

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20132013-01-01 00:00:00 UTC2014-01-01 00:00:00 UTC743
20142014-01-01 00:00:00 UTC2015-01-01 00:00:00 UTC523
20152015-01-01 00:00:00 UTC2016-01-01 00:00:00 UTC936
20162016-01-01 00:00:00 UTC2017-01-01 00:00:00 UTC202
20172017-01-01 00:00:00 UTC2018-01-01 00:00:00 UTC413
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC110
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC211

What Hacker News says

30 sources
dmix·Sep 12, 2019
Frontend developers have been using PostCSS for the transition period until this is fully adopted (which is a library set similar to Babel for adopting future JS, as well as experimenting with new CSS language level ideas): https://github.com/MadLittleMods/postcss-css-variables There’s also plugins for nesting and mixins if you want a more complete SASS replacement which seems to be the toolset the industry is moving towards. The most popular PostCSS library is autoprefixer which is also helping with the transition to future CSS without all of the browser baggage. https://github.com/postcss/autoprefixer
In Show HN: Laptop.css
TheAceOfHearts·Jul 2, 2017
If you've been following CSS grid at all, or if you look up anything related to it, you'll probably encounter something written by Rachel Andrew. She's been doing an incredible job at documenting and promoting CSS grid. In the past she wrote a CSS grid polyfill [0], but sadly it never got updated to the latest version of the spec. It'd be an easier sell if you could polyfill it reasonably on some older browsers, even if performance suffered a bit. Right now the last holdout is Edge [1], which is funny because they were the first to ship the older spec, going back as far as IE10 or IE11. Luckily, the next version will be shipping the latest spec. I've noticed autoprefixer [2] supports a grid option. I'd love a guide that explained any incompatibilities between the two versions. Getting a mostly working grid on IE11 and Edge would probably
Read the rest
make it an easier sell for many. When flexbox started growing popular there were guides showing you could support most features on IE10 and beyond with little effort if you used autoprefixer. Since there are equivalent versions of most attributes on older browsers, you just had to be aware of bugs and gotchas. For example, the default value for flex-grow, flex-shrink, and flex-basis (and their older equivalents) changed between versions, so if you always had to set them. In addition to any incompatibilities between versions, all implementations were buggy, so you had to be aware of bugs and their workarounds. Luckily, they're all well documented on the flexbugs [3] repo. Considering grid is more complicated than flexbox, I wouldn't be surprised to find it has a few bugs. Does anyone know if there's a gridbugs repo that developers can track? EDIT: After a quick search, I found a blog post [4] talking about supporting the older version. [0] https://github.com/FremyCompany/css-grid-polyfill/ [1] http://caniuse.com/#feat=css-grid [2] https://github.com/postcss/autoprefixer [3] https://github.com/philipwalton/flexbugs [4] https://rachelandrew.co.uk/archives/2016/11/26/should-i-try-...
In You don't need a grid framework on top of the CSS grid layout
saidajigumi·May 16, 2016
It'd be nice to see support similar to Autoprefixer[1]'s use of Browserlist queries[2]. Those let the developer to specify the desired target platforms by browser versions, by global usage stats (e.g. '> 5%'), or by custom usage stats ('> 5% in my stats') etc., and derive the correct prefixes needed to deploy to those targets. EDIT (for clarity): It'd be great to see similar query support to derive a "lowest common denominator" Babel preset for an intended ES generation vs. browser profile set. [1] https://github.com/postcss/autoprefixer [2] https://github.com/ai/browserslist#queries
In WebKit is now 100% ES6 complete

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