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📦 Update dependency autoprefixer to v9.7.0 #25238

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@renovate-bot renovate-bot commented Oct 24, 2019

This PR contains the following updates:

Package Type Update Change
autoprefixer devDependencies minor 9.6.5 -> 9.7.0

Release Notes

postcss/autoprefixer

v9.7.0

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Brotherhood of Steel coat of arms

Autoprefixer 9.7 brings AUTOPREFIXER_GRID environment variable and huge performance improvments.

Grid Environment Variable

Autoprefixer can add CSS Grid polyfills for IE. You need to manually enable it to prove that you understand the limits of polyfill.

In previous versions you can enable Grid polyfill by grid: 'autoplace' option or by /* autoprefixer grid: autoplace */ control comment. But in some cases, developers were not able to use both methods. For instance, during work with Material UI’ CSS-in-JS in Create React App.

Now Autoprefixer supports environment variable to enable CSS Grid polyfill:

AUTOPREFIXER_GRID=autoplace npm build

Performance Improvements

@​Knagis found that Browserslist takes 70% of the Autoprefixer time.

Autoprefixer 9.6.5 profiling

We did a lot of improvements in Browserslist and now Autoprefixer should work much faster.

67417985-a283e180-f5d2-11e9-879a-e364c9acccf1

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@renovate-bot renovate-bot changed the title 📦 Update dependency autoprefixer to v9.7.0 📦 Update dependency autoprefixer to v9.7.0 Oct 24, 2019
@danielrozenberg danielrozenberg merged commit 680dc62 into ampproject:master Oct 24, 2019
@renovate-bot renovate-bot deleted the renovate/autoprefixer-9.x branch October 24, 2019 16:52
micajuine-ho pushed a commit to micajuine-ho/amphtml that referenced this pull request Dec 27, 2019
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3 participants