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Welcome CSS LV5
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Afonso Pacifer
August 29, 2020
Programming
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Welcome CSS LV5
Afonso Pacifer
August 29, 2020
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Transcript
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- My English is terrible Warnings: - My first talk
in English - Puedes preguntar en español
@afonsopacifer Bienvenida CSS Lv5.
Afonso Pacifer. Principal JS developer at @valleweb Host at @frontendbr
Co-organizer at @meetupcss Former CSS evangelist @afonsopacifer afonsopacifer.github.io
Brazil Community.
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None
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CSS LV5?
What? What happens To CSS4?
WTF! CSS 5?
Lek,
Back to base
World Wide Web Consortium https://www.w3.org/
Write Specs Implement Features
CSS 4 ? CSS 5 ?
Understanding the past to explain the future
CSS short timeline
1994 Håkon Wium Lie starts the first CSS draft. The
first presentation about CSS happened in Chicago at the WWW Conference. Bert Boss interested in the idea started helping the project.
1995 This year, In the same conference, the W3C became
interested. The first e-mail list about CSS was created.
1996 W3C released the CSS 1.0 specification. Internet Explorer 3
as the first browser to support CSS, followed by Netscape 4 and Opera 3.5.
1997 The CSS Working Group It was officially created.
1998 W3C released the CSS 2.0 specification. Erick Mayer release
the developer suit for Opera. This project improving the browser CSS support.
2011 W3C released the CSS 2.1.
2014 W3C released the HTML 5 bundle. The CSS3 leaves
the draft status to become a recommendation.
1994 1995 1996 1997 1998 2011 2014 2020 CSS 2.0
CSS 2.1
The solution?
CSS 3
Much more than animations, flexbox, borders, etc…
CSS 2.1 CSS 3 All CSS Specs Version 2.1 Flex
box Selectors Grid Layout Custom properties Media queries LV 1 LV 1 LV 2 LV 4 LV 5 Modules Monolith
A global CSS 4 or CSS 5 Don't make sense
What happens inside a level?
Working Draft WD Canditate Recommendation CR Proposed Recommendation PR Recommendation
REC
My Tips and Tricks
Follow the Editors
Help the Editors
Study the Specs
Example!
CSS Color Module Level 5 https://www.w3.org/TR/css-color-5/
None
Dynamically adjust color without preprocessors
color-mix() Take two colors and mixing them
mix-color( ) #ff0000 #00ff2f
Browsers Support?
None
Why?
Lets understand
rgb(255, 0, 0) #ff0000 lch(54, 106, 40) lightness: 54.2917% chroma:
106.8390 hue: 40.8526
https://lea.verou.me/2020/04/lch-colors-in-css-what-why-and-how/
mix-color(#ff0000 #ffff00 ) 60% 40% 60%
How mix-color() work
60% 40% + Mixed lightness lch(C1_L, C1_C, C1_H) lch(C2_L, C2_C,
C2_H) C1_L * 60/100 + C2_L * 40/100 = X Mixed chroma C1_C * 60/100 + C2_C * 40/100 = Y Mixed hue C1_H * 60/100 + C2_H * 40/100 = z Result: lch(x, y, z)
None
CSS is easy to learn But its very very hard
to become an expert “
color-contrast() Select the better contrast following the WCAG
None
color-contrast( ) contrast ratio: 1.6 contrast ratio: 3.99 contrast ratio:
1.07 white #ccc, red, yellow
Better A11y .button { color :color-contrast(var(—bg) var(--theme-a), var(—theme-b)); } Custom
Design Systems Easy dark mode
Browsers Support?
None
None
And many others Cool functions
CSS Colors lv5 Is the future
Polyfill?
The Dark Side of Polyfilling CSS https://philipwalton.com/articles/the-dark-side-of-polyfilling-css/
My new side project: css-color-polyfill
CSS Houdini https://developer.mozilla.org/en-US/docs/Web/Houdini
Final tips!
https://14habits.com/
Empieza a hacer lo que no sabes, y la evolución
será solo una consecuencia - Afonso Pacifer “
@afonsopacifer afonsopacifer.github.io Gracias.