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
Snowflake Intelligenceにはこうやって立ち向かう!クラシルが考えるAI Readyなデータ基盤と活用のためのDataOps
gappy50
0
250
TS-S205_昨年対比2倍以上の機能追加を実現するデータ基盤プロジェクトでのAI活用について
kaz3284
1
170
BPaaSにおける人と協働する前提のAIエージェント-AWS登壇資料
kentarofujii
0
140
生成AI時代のデータ基盤設計〜ペースレイヤリングで実現する高速開発と持続性〜 / Levtech Meetup_Session_2
sansan_randd
1
150
Oracle Base Database Service 技術詳細
oracle4engineer
PRO
9
73k
自作JSエンジンに推しプロポーザルを実装したい!
sajikix
1
180
いま注目のAIエージェントを作ってみよう
supermarimobros
0
300
なぜスクラムはこうなったのか?歴史が教えてくれたこと/Shall we explore the roots of Scrum
sanogemaru
5
1.6k
OCI Oracle Database Services新機能アップデート(2025/06-2025/08)
oracle4engineer
PRO
0
150
「全員プロダクトマネージャー」を実現する、Cursorによる仕様検討の自動運転
applism118
21
11k
AIのグローバルトレンド2025 #scrummikawa / global ai trend
kyonmm
PRO
1
290
roppongirb_20250911
igaiga
1
240
Featured
See All Featured
Fashionably flexible responsive web design (full day workshop)
malarkey
407
66k
Balancing Empowerment & Direction
lara
3
620
Thoughts on Productivity
jonyablonski
70
4.8k
Docker and Python
trallard
45
3.6k
Code Reviewing Like a Champion
maltzj
525
40k
Reflections from 52 weeks, 52 projects
jeffersonlam
352
21k
Producing Creativity
orderedlist
PRO
347
40k
Writing Fast Ruby
sferik
628
62k
Embracing the Ebb and Flow
colly
87
4.8k
RailsConf 2023
tenderlove
30
1.2k
Rebuilding a faster, lazier Slack
samanthasiow
83
9.2k
The Power of CSS Pseudo Elements
geoffreycrofte
77
6k
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