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 in JS: The Good & Bad Parts
Search
Robin Frischmann
October 25, 2017
Programming
6
2.1k
CSS in JS: The Good & Bad Parts
Slides for my talk at ReactiveConf 2017 in Bratislava, Slovakia.
Robin Frischmann
October 25, 2017
Tweet
Share
More Decks by Robin Frischmann
See All by Robin Frischmann
Reusability: Sharing components with joy
rofrischmann
1
170
Components done right™
rofrischmann
0
140
Other Decks in Programming
See All in Programming
12年前の『型システム入門』翻訳の思い出話
mame
11
1.2k
Product Management LT会_クアンド新家
shinshin
0
260
Prompt FlowによるLLMアプリケーション開発
yuto2000
1
1k
コード生成を伴うLLMエージェント - 2024.07.18 Tokyo AI
smiyawaki0820
11
4.1k
AWS CDKにおける「再利用性」を考える / aws-cdk-reusability
gotok365
6
1.3k
Namespace on read
tagomoris
2
370
DDDを志して3年経ったら「DDDの皮を被ったクリーンアーキテクチャ」になった話【デブサミ2024夏】
texmeijin
1
620
日付と正規化
megmogmog1965
0
140
Webエディタライブラリ 「CodeMirror」から学ぶ Webアプリ開発のテクニック
ryosukeigarashi
0
250
君たちはどうコードをレビューする (される) か / 大吉祥寺.pm
utgwkk
15
8.5k
開発部に不満を持っていたCSがエンジニアにジョブチェンしてわかった「勝手に諦めない」ことの大切さ
sakuraikotone
28
16k
Javaの現状2024夏 / Java current status 2024 summer
kishida
4
1.4k
Featured
See All Featured
How to name files
jennybc
67
96k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
17
1.5k
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
34
1.9k
Documentation Writing (for coders)
carmenintech
63
4.2k
Facilitating Awesome Meetings
lara
46
5.8k
Web Components: a chance to create the future
zenorocha
307
41k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
360
22k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
16
1.6k
Building Adaptive Systems
keathley
34
2k
Keith and Marios Guide to Fast Websites
keithpitt
408
22k
Building an army of robots
kneath
301
42k
RailsConf 2023
tenderlove
16
720
Transcript
CSS in JS The Good & Bad Parts ReactiveConf 2017
Robin Frischmann @rofrischmann @rofrischmann
None
rofrischmann/fela
Who is already familiar with CSS in JS ?
CSS in JS 101
CSS in JS !!!== inline style
const style = { fontSize: 12, color: 'red', ':hover': {
color: 'blue' }, '@media (min-width:320px)' { fontSize: 12 } } const style = ` font-size: 12px; color: red; &:hover { color: blue; } @media (min-width:320px) { font-size: 14px; } } ` Objects Template strings
The Problems
Choosing the “right” library 1
• aphrodite • babel-plugin-css- in-js • babel-plugin-pre- style • bloody-react-styled
• classy • csjs • css-constructor • css-light • css-loader • css-ns • cssobj • cssx-loader • emotion • es-css-modules • glamor • glamorous • hyperstyles • i-css • j2c • jsxstyle • linaria • pre-style • radium • react-css-builder • react-css- components • react-css-modules • react-cssom • react-cxs • react-fela • react-free-style • react-inline-css • react-inline-style • react-inline • react-jss • react-look • react-native-web • react-statics-styles • react-styl • react-style • react-styleable • react-stylematic • react-theme • react-vstyle • reactcss • restyles • scope-styles • smart-css • stile-react-media- queries • stilr • style-it • styled-components • styled-jsx • styletron-react • styling • superstyle • typestyle • uranium
Use what works for you!
1. Objects or Template Strings? 2. Working with Designers? 3.
Simplicity or Flexibility? 4. React-centric or Framework-agnostic? 5. Server-side Rendering?
None
Not everyone is used to JavaScript 2
1. Choosing a library is hard 2. Using CSS in
JS does not always turn out to be a good choice at all
The Benefits
It’s JavaScript! 1
Who has used or is using a preprocessor like Sass,
Less or Stylus? ?
JavaScript everywhere!
$primary-color = red .button { color: $primary-color; padding: 15px 20px;
font-size: 20px; } const primaryColor = 'red' const buttonStyle = { color: primaryColor, padding: '15px 20px', fontSize: 20 } (S)CSS JS
$vendors: "-webkit-", "-ms-", ""; @mixin prefix($property, $value) { @each $vendor
in $vendors { !#{$vendor}!#{$property}: !#{$value}; } } .button { @include prefix( 'border-radius', '5px' ) } const vendors = ['-webkit-', '-ms-', ''] function prefix(property, value) { return vendors.reduce( (style, vendor) !=> { style[vendor + property] = value return style }, {} ) } const buttonStyle = { !!...prefix( 'border-radius', '5px' ) } SCSS JS
Ecosystem
styled-components/polished
Computers do the hard work 2
– Phil Karlton “There are only two hard things in
Computer Science: cache invalidation and naming things.”
Naming CSS classes is hard
BEM smacss.com oocss.org getbem.com OOCSS SMACSS
Conventions !!!== enforced
Computers for the rescue!
Class Names? Non of my business!
– Alan B Smith “[…] the appeal of CSS-in-JS is
not simplicity, rather predictability and consistency.” Source: https://hackernoon.com/why-we-use-styled-components-at-decisiv-a8ac6e1507ac
Predictable Styling 3
Who has ever accidentally destroyed the layout or styles of
some part of the application, while actually working on something completely different? ?
const view = () !=> ( <div className={ 'text_green' }>
Some Text !</div> ) .text_green { color: green } JS(X) CSS
const view = state !=> ( <div className={ state.error ?
'text_red' : 'text_green' }> Some Text !</div> ) .text_red { color: red } .text_green { color: green } JS(X) CSS
const view = state !=> ( <div className={ state.error ?
'text_red' : 'text_green' }> Some Text !</div> ) .text_red { font-size: 20px; color: yellow; } .text_green { color: green } JS(X) CSS
UI = f(state)
#1 What is displayed #2 How is it displayed
How What Markup Styling HTML CSS
UI = f(state)
Style = f(state)
import { css } from 'any-css-in-js-library' const style = state
!=> ({ color: state.error ? 'red' : 'green' }) const view = state !=> ( <div className={css(style(state))}> Simple Text !</div> ) JS(X)
- Choosing a library is hard - Using CSS in
JS is not necessarily the best choice ✓ Power of JavaScript ✓ Unique generated classes ✓ Predictable UI Benefits Problems
@rofrischmann @rofrischmann
Thank you! @rofrischmann @rofrischmann