Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
CSS Modules, CSS Variables and the Future of Re...
Search
Glen Maddern
May 11, 2016
Technology
9
1.3k
CSS Modules, CSS Variables and the Future of Reusable CSS
Presented at CSSConf Budapest, 2016 <3
Glen Maddern
May 11, 2016
Tweet
Share
More Decks by Glen Maddern
See All by Glen Maddern
The Road to Styled Components & the Road Ahead
geelen
2
240
The Road to Styled Components
geelen
2
1.3k
Styled Components and the Road to Unification
geelen
2
280
The Future of Reusable CSS
geelen
2
210
Other Decks in Technology
See All in Technology
カミナシ社の『ID管理基盤』製品内製 - その意思決定背景と2年間の進化 #AWSUnicornDay / Kaminashi ID - The Big Whys
kaminashi
3
540
異業種出身エンジニアが気づいた、転向して十数年経っても変わらない自分の武器とは
macnekoayu
0
220
そのコンポーネント、サーバー?クライアント?App Router開発のモヤモヤを可視化する補助輪
makotot
4
760
Understanding Go GC #coefl_go_jp
bengo4com
1
1.1k
実践アプリケーション設計 ①データモデルとドメインモデル
recruitengineers
PRO
5
1.2k
生成AI時代に必要な価値ある意思決定を育てる「開発プロセス定義」を用いた中期戦略
kakehashi
PRO
1
190
Jaws-ug名古屋_LT資料_20250829
azoo2024
3
190
VPC Latticeのサービスエンドポイント機能を使用した複数VPCアクセス
duelist2020jp
0
330
小さなチーム 大きな仕事 - 個人開発でAIをフル活用する
himaratsu
0
140
Product Management Conference -AI時代に進化するPdM-
kojima111
0
260
Devinを使ったモバイルアプリ開発 / Mobile app development with Devin
yanzm
0
210
モダンフロントエンド 開発研修
recruitengineers
PRO
8
5.1k
Featured
See All Featured
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
161
15k
Java REST API Framework Comparison - PWX 2021
mraible
33
8.8k
Bootstrapping a Software Product
garrettdimon
PRO
307
110k
YesSQL, Process and Tooling at Scale
rocio
173
14k
How to train your dragon (web standard)
notwaldorf
96
6.2k
Building Flexible Design Systems
yeseniaperezcruz
328
39k
Typedesign – Prime Four
hannesfritz
42
2.8k
GraphQLとの向き合い方2022年版
quramy
49
14k
Why Our Code Smells
bkeepers
PRO
339
57k
Automating Front-end Workflow
addyosmani
1370
200k
Producing Creativity
orderedlist
PRO
347
40k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
29
2.8k
Transcript
Reusable CSS CSS VARIABLES, CSS MODULES & THE FUTURE OF
@glenmaddern
HELLO BUDAPEST! ♥
Reusable CSS CSS VARIABLES, CSS MODULES & THE FUTURE OF
@glenmaddern
None
WHY IS IT SO HARD TO SHARE CSS?
WHY IS IT SO HARD TO REUSE CSS?
import something from 'somewhere' something.leftPad()
THE HUMAN BRAIN IS A (IN)CONSISTENCY-DETECTING MACHINE
http://semantic-ui.com
http://semantic-ui.com
http://semantic-ui.com
http://www.novolume.co.uk/blog/all-websites-look-the-same/
http://graphicriver.net/
None
WE DON'T NEED MORE TOOLING TO MAKE OUR CURRENT COMPONENTS
THEMEABLE WE NEED TO START BUILDING BETTER COMPONENTS
st ep #1
RESPONSIVE COMPONENTS
A COMPONENT SHOULD RESPOND TO ITS ENVIRONMENT • • RATHER
THAN THE ENVIRONMENT OVERRIDING THE COMPONENT
OUTSIDE-IN OVERRIDES
https://en.wikipedia.org/wiki/Margaret_Hamilton_(scientist)
http://semantic-ui.com
MAKE YOUR COMPONENTS LESS RESPONSIBLE & MORE RESPONSIVE
layout
PADDING CONTENT MARGIN
PADDING CONTENT MARGIN
.component { width: 50%; margin-top: 2rem; flex-grow: 1; } ❌
.parent { display: flex; padding: 1rem; } .parent > *
{ flex-grow: 1; } ONE ONE TWO ONE TWO THREE
.parent { display: flex; padding: 1rem; } .parent > *
{ flex-grow: 1; } .parent > * + * { margin-left: 1rem; } ONE ONE TWO ONE TWO THREE
.parent { display: flex; padding: 1rem; } .parent > *
{ flex-grow: 1; } .parent > * + * { margin-left: 1rem; } .parent > :first-child { flex: 0 0 50%; } ONE TWO ONE TWO THREE ONE TWO THREE FOUR
LAYOUT IS THE CONCERN OF THE p arent
DEMO: CURRENTCOLOR
https://www.youtube.com/watch?v=jPOBVaomzLE
css v ari able s
http://caniuse.com/#feat=css-variables
CSS CUSTOM PROPERTIES CSS VARIABLES =
.component { --size: 2rem; width: calc(2 * var(--size)); height: var(--size);
} .component
.component { --size: var(--spacing, 2rem); width: calc(2 * var(--size)); height:
var(--size); } .component .container .component .container { --spacing: 1rem; }
.component { --size: var(--spacing, 2rem); width: calc(2 * var(--size)); height:
var(--size); } .component .component.large .large { --spacing: 4rem; /* or */ --size: 4rem; }
.component { background: var(--bg, black); color: var(--fg, white); }
.component { background: var(--bg, black); color: var(--fg, white); } (bg,
fg) => <Component style.../>
DEMO: INVERTED BUTTON
INHERITANCE THE CASCADE vs
st ep #2
EXPLICIT COMPONENTS
http://semantic-ui.com/elements/button.html
http://jxnblk.com/rebass/#Button
DEMO: DOCUMENTATION
NAMING MISMATCHES?
.container .container { --grid-size: 1rem; } .component .component .component {
--size: var(--spacing, 2rem); width: calc(2 * var(--size)); height: var(--size); }
.component .container .component.fix .container { --grid-size: 1rem; } .fix {
--spacing: var(--grid-size); } .component { --size: var(--spacing, 2rem); width: calc(2 * var(--size)); height: var(--size); }
st ep #3
RESILIENT COMPONENTS
w arning: re act
import styles from './MediaObject.css' const MediaObject = ({ title, image,
text }) => ( <div className={styles.outer}> <img className={styles.img} src={ image }/> <div className={styles.inner}> <h1 className={styles.h1}>{ title }</h1> <p className={styles.p}>{ text }</p> </div> </div> )
import styles from './MediaObject.css' const MediaObject = ({ title, image,
text, theme=styles }) =>( <div className={theme.outer}> <img className={theme.img} src={ image }/> <div className={theme.inner}> <h1 className={theme.h1}>{ title }</h1> <p className={theme.p}>{ text }</p> </div> </div> ) https://github.com/css-modules/css-modules/issues/147
DEMO: INTERNAL STRUCTURE DOCS
✅ RESPOND TO ENVIRONMENT ✅ USE INTERNAL VARIABLES ✅ EXPOSE
INTERNAL STRUCTURE
t hank you! @glenmaddern