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PostCSS 5.0: for Custom CSS Preprocessing
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Masaaki Morishita
August 30, 2015
Programming
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PostCSS 5.0: for Custom CSS Preprocessing
at Back to Basics, CSS event in Japan
Masaaki Morishita
August 30, 2015
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Transcript
PostCSS'5.0 for$Custom$CSS$Preprocessing in#Back#to#Basics
About&me • Masaaki'Morishita • Twi.er:'@morishi.er_ • GitHub:'morishi.er • ΠΧ:'CSS0830 •
αΠόʔΤʔδΣϯτʢ৽ଔ1ʣ • PostCSSΤόϯδΣϦετʢࣗশʣ
Blog
PostCSSͰ࡞ͬͨͷ • CSSfmt:((S)CSSίʔυܗπʔϧ • AtCSS:(΅͕͔͘Μ͕͍͖͑ͨ͞ΐ͏ͷCSSϓϦϓϩηοαʔ • postcss0style0guide:(ελΠϧΨΠυδΣωϨʔλʔ • ଞϓϥάΠϯ7ͭ
PostCSSͱ
PostCSS • Node.jsͷCSS෩ݴޠύʔαʔ • ASTΛૢ࡞͢ΔศརAPIΛఏڙ • ASTͷૢ࡞શͯϓϥάΠϯ͕୲ • PostCSSࣗମCSSϓϦϓϩηοαʔͰͳ͍ •
ϓϥάΠϯͷΤίγεςϜؚΊͯPostCSSͱݺΕΔ
PostCSS'ͱԿ͔ h"ps:/ /speakerdeck.com/jmblog/postcss5tohahe5ka
ࠓ͢͜ͱ
PostCSS'5.0 for$Custom$CSS$Preprocessing
The$Beginning$is$...
rework Plugin'framework'for'CSS'preprocessing
Modular(CSS(preprocessing( with(rework h"p:/ /tjholowaychuk.tumblr.com/post/ 44267035203/modular=css=preprocessing=with= rework
Custom'CSS'preprocessing h"p:/ /nicolasgallagher.com/custom4css4 preprocessing/
rework&(in&2012) • AutoprefixerͱͱreworkͰ࡞ΒΕ͍ͯͨ • ʢAutoprefixerͱPostCSSͷ࡞ऀಉ͡ʣ • ͔࣌͠͠reworkϒϥβϋοΫΛύʔεͰ͖ͳ͔ͬͨ • ʢ͋ͱTJʹAutoprefixerΛdisΒΕͨΓ…ʣ •
ʮΑ͠ɺࣗͰ࡞Ζ͏ʂʯ
PostCSS'ੜ
The$History$of$PostCSS
PostCSSʢʙ'v1ʣ • "PostCSS)is)a)framework)for)CSS)postprocessors" • AutoprefixerͷͨΊʹ࡞ΒΕͨ • ͜ͷࠒCoffeeScriptͰॻ͔Εͯͨ • ࡞ऀRuby͖ͰSass͖
PostCSS'(v2'ʙ'v4) • ϓϥάΠϯ͕େྔʹ࡞ΒΕ͍ͯ͘ • ݴޠ֦ுͷͨΊͷϓϥάΠϯ࡞ΒΕ͍ͯ͘ • cssnext,)AtCSS,)PreCSS • ʮϙετϓϩηεͱ͍͍ͬͨ…ʯ
None
PostCSS'5.0 released'on'August'20,'2015
PostCSS'5.0 • ࠓ·ͰͰҰ൪େ͖͍มߋ • API໊͕มߋ • Node.js,v0.10ͷαϙʔτ͕ͳ͘ͳΔ • Custom'Syntaxes
Custom'Syntaxes • SyntaxΛࣗͰఆٛ͠ɺPostCSSͷASTʹύʔεͰ͖Δ • ΦϓγϣϯͷՃ • parser:/ύʔαʔΛબ • stringifier:/ΞτϓοτͷॲཧΛબ •
syntax:/parser/+/stringifier postcss().process(source, { syntax: scss })
Custom'Syntaxes • postcss'scss • SCSS༻ͷPostCSS+Syntax • PostCSSͰSCSSϑΝΠϧΛCSSʹίϯύΠϧͰ͖ΔΑ͏ʹ ͳͬͨΘ͚Ͱͳ͍ • SCSS+to+CSSͷίϯύΠϥʢϓϥάΠϯύοΫʣΛ࡞ͬͯΔਓ
͕͍ΔΒ͍͠
Custom'Syntaxes • for%CSS(in(JS • JSΦϒδΣΫτΛPostCSS%ASTʹม • React%Style%Autoprefixer • Styling
PostCSS'is'Awesome!!
※͔͜͜ΒݸਓͷײͰ͢
CSSͷಠࣗه๏Λ࡞ͬͯํͳ͍ ݁ہͲΕͨͩͷγϯλοΫεγϡΨʔ
@function halfSize($value) { @return $value / 2; } $val: 100px;
:root { // Main theme color --color: red; } .foo { width: halfSize($val); } .bar { color: var(--color); padding: $val / 10; }
(")
CSS๊͕͑ΔԿ͔
நԽͱ࠶ར༻ʁ ΧεέʔσΟϯάͱηϨΫλʔৄࡉʁ
ϓϦϓϩηοαʔͲ͏͋Δ͖͔
ಓ۩ʹৼΓճ͞Εͣɺຊ࣭ΛݟΔ
Back%to%Basics
Thanks':D @morishi(er_