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Feature/vendor specific transition #1260

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merged 6 commits into from Oct 30, 2019

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fanich37
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This PR should close #1217 . The issue is about transition property was prefixed with all of the prefixes even though not all of them are required (like -moz- prefixes in -webkit- rule).

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@@ -15,7 +17,8 @@ class Transition {
add (decl, result) {
let prefix, prop
let add = this.prefixes.add[decl.prop]
let declPrefixes = (add && add.prefixes) || []
let vendorPrefixes = this.ruleVendorPrefixes(decl)
let declPrefixes = vendorPrefixes || (add && add.prefixes) || []
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Why do we need add here?

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I described it here.

@@ -33,6 +36,8 @@ class Transition {
if (!prefixer || !prefixer.prefixes) continue

for (prefix of prefixer.prefixes) {
if (vendorPrefixes && !vendorPrefixes.includes(prefix)) continue
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We can always have array in vendorPrefixes (by returning [] instead of false) and about this extra check.

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I like the idea of returning false cause here we need to check whether rule is vendor specific. If it's not - we don't have to check the prefix. By the way I just found out the check itself

!vendorPrefixes.includes(prefix)

works incorrect. Prefix might be -webkit- 2009 for example. I'll fix it.

@ai ai merged commit 5cfde29 into postcss:master Oct 30, 2019
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ai commented Nov 1, 2019

Released in 9.7.1

@fanich37 fanich37 deleted the feature/vendor-specific-transition branch November 1, 2019 06:11
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Successfully merging this pull request may close these issues.

Autoprefixer generically adds prefixes to browser-specific pseudo-classes
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