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
Collaborative JS
Search
Ben Foxall
August 10, 2016
Technology
1
150
Collaborative JS
How to build a collaborative browser-based editor (and why)
Ben Foxall
August 10, 2016
Tweet
Share
More Decks by Ben Foxall
See All by Ben Foxall
Web Sites & Fairy Lights
benfoxall
0
110
Making Simple Things
benfoxall
2
230
Simpler Things
benfoxall
0
1.6k
Using Browsers to Visualise Data
benfoxall
0
72
Serving Data From Browsers
benfoxall
0
48
Building multi-device interfaces with the web
benfoxall
1
170
Other Decks in Technology
See All in Technology
Potential EM 制度を始めた理由、そして2年後にやめた理由 - EMConf JP 2025
hoyo
2
2.8k
脳波を用いた嗜好マッチングシステム
hokkey621
0
290
手を動かしてレベルアップしよう!
maruto
0
230
Autonomous Database Serverless 技術詳細 / adb-s_technical_detail_jp
oracle4engineer
PRO
17
45k
システム・ML活用を広げるdbtのデータモデリング / Expanding System & ML Use with dbt Modeling
i125
1
340
JavaにおけるNull非許容性
skrb
2
2.6k
AIエージェント入門
minorun365
PRO
32
18k
役員・マネージャー・著者・エンジニアそれぞれの立場から見たAWS認定資格
nrinetcom
PRO
4
6.3k
【詳説】コンテンツ配信 システムの複数機能 基盤への拡張
hatena
0
270
Exadata Database Service on Cloud@Customer セキュリティ、ネットワーク、および管理について
oracle4engineer
PRO
2
1.5k
スキルだけでは満たせない、 “組織全体に”なじむオンボーディング/Onboarding that fits “throughout the organization” and cannot be satisfied by skills alone
bitkey
0
190
IAMポリシーのAllow/Denyについて、改めて理解する
smt7174
2
210
Featured
See All Featured
The Art of Programming - Codeland 2020
erikaheidi
53
13k
A Modern Web Designer's Workflow
chriscoyier
693
190k
Scaling GitHub
holman
459
140k
Bootstrapping a Software Product
garrettdimon
PRO
306
110k
Docker and Python
trallard
44
3.3k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
30
2.2k
Making Projects Easy
brettharned
116
6k
Faster Mobile Websites
deanohume
306
31k
Code Review Best Practice
trishagee
67
18k
Adopting Sorbet at Scale
ufuk
74
9.2k
The Language of Interfaces
destraynor
156
24k
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
eileencodes
21
2.5k
Transcript
HELLO! I'm @benjaminbenben!
I work at @Pusher
None
I co-organise @JSOxford
None
I've not really said this stuff yet 1. Tell me
if we've been here too long 2. I'd be happy (and sorry) if you tell me this is rubbish
Live coding across all the things
Live coding across all the things
How to build a collaborative browser-based editor (and why)
䡿 Browser-based editors
None
side note - not just frontend
None
cojs.co
!
/
/ 䡿 The challenges
None
The challenges —Making a textarea feel nice —Showing content —Code
transpilation —External modules —Not breaking things
/ 䡿 The challenges Making a textarea feel nice
Web based code editors (maybe don't write one yourself) —Ace
Editor —Monaco —CodeMirror —~Atom~
None
Integration with our textarea CodeMirror.fromTextArea(source)
…tonnes more stuff
/ 䡿 The challenges Showing content <iframe id="target" href="/mypage"></iframe> (normal
answer: host it somewhere) !
Option 1.
"Upload" to ServiceWorker Web page → Service Worker → Network
hmmmmm —trendy —cool —persistant urls —overkill possibly —support is …
positive? —really cool
Option 2.
Data URIs
data:[<mediatype>][;base64],<data>
data:text/html,<h1>Hello! !
iframe.src = 'data:text/html;charset=utf-8,'+ '%3Cbody%3E%3Cscript%3E' + encodeURI(source.value) + '%3C/script%3E'
hmmm —lack of error handling —length limitations —random encoding issues
—restrictions…
None
Option 3.
Blobs new Blob(blobParts[, options])
b = new Blob(['…'], {type: 'text/html'})
b = new Blob(['…'], {type: 'text/html'}) url = URL.createObjectURL(b) //
"blob:https%3A/…/2084018…ab3a2cec02" // later URL.revokeObjectURL(url) !
var blob = generate(source.value) URL.revokeObjectURL(target.src) iframe.src = URL.createObjectURL(blob)
hmmm! —not stored on the stack —safe, and lots of
control —sounds cool
/ 䡿 The challenges Code transpilation
ES2015 const hey = (you) => console.log(`HELLO ${you}`) !
Tracuer Babel Bublé
All pretty cool, though personally ♥Bublé
Bublé —inspired by Babel —no shims / polyfills —compact transforms
only —less extensibility —fast —Nice one, Rich Harris
buble.transform(source.value).code
/ 䡿 The challenges External modules
// commonjs const utils = require('utils') utils.say('yeah!') // ES2015 modules
import {say} from 'utils' say('yeah!')
bundling !
Webpack Browserify Rollup
All pretty cool, though… ♥Rollup
Rollup —embracing ES2015 modules —minimal code-rewriting —tree shaking —d3, THREE.js
Rollup —embracing ES2015 modules —minimal code-rewriting —tree shaking —d3, THREE.js
—Seriously, Rich Harris you're the best
rollup.rollup({ entry: '__main__', plugins:[ { resolveId: (i) => i, load:
(id) => { if(id == '__main__') return source.value return fetch('/module/' + id + '.js') } } ] }).then(bundle => bundle.generate({ format: 'iife' }).code )
/ 䡿 The challenges Not breaking things
for(var i = 99; i > 0; i++) { console.log(`${i}
bottles of beer`) }
jsbin/loop-protect Super props, Remy Sharp loopProtect(`for(var i = 99; i
> 0; i++) { console.log(\`${i} bottles of beer\`) }`)
{;loopProtect.protect({ line: 1, reset: true }); for(var i = 99;
i > 0; i++) { if (loopProtect.protect({ line: 1 })) break; console.log(`${i} bottles of beer`) } !
/
/ 䡿 Why
Closing the loop
Closing the loop change, save, tab, ftp, wait, tab, refresh
Uploading stuff to a server
Closing the loop change, save, tab, refresh Local development
Closing the loop change, save Live reload+
Closing the loop change In place editing
This is a good thing
/ 䡿 Why Multi Device Development Experiments
/1 Collaboration
None
/2 Broadcast
/2.1 (Broadcast) For development
/2.2 (Broadcast) For talk-workshops
/3 Social inspired development
/
/ demo? let's build a "musical instrument"
People & user experience are the difficult things (so let's
focus on them)
Thank you, I'm @benjaminbenben (also, right here)