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
How to use Scala.js in real world?
Search
kyo_ago
January 29, 2016
Technology
1
2.1k
How to use Scala.js in real world?
kyo_ago
January 29, 2016
Tweet
Share
More Decks by kyo_ago
See All by kyo_ago
フロントエンドの リソース管理の話 TechFeed Summit#1 #techfeed #techfeedsummit
kyo_ago
5
2k
TypeScriptでType Match的なことをする話 #すえなみチャンス暑気払い
kyo_ago
1
1.3k
WebReplayから見るWeb開発の未来 #builderscon
kyo_ago
2
960
今日から始めるbugbounty
kyo_ago
0
280
karmaを使ったSPA向けE2Eテスト技法
kyo_ago
6
5.5k
E2Eという名称の指すもの
kyo_ago
0
2.5k
Other Decks in Technology
See All in Technology
讓測試不再 BB! 從 BDD 到 CI/CD, 不靠人力也能 MVP
line_developers_tw
PRO
0
1k
標準技術と独自システムで作る「つらくない」SaaS アカウント管理 / Effortless SaaS Account Management with Standard Technologies & Custom Systems
yuyatakeyama
2
460
_第3回__AIxIoTビジネス共創ラボ紹介資料_20250617.pdf
iotcomjpadmin
0
140
Prox Industries株式会社 会社紹介資料
proxindustries
0
100
Agentic Workflowという選択肢を考える
tkikuchi1002
1
210
AIエージェント最前線! Amazon Bedrock、Amazon Q、そしてMCPを使いこなそう
minorun365
PRO
7
1.1k
Абьюзим random_bytes(). Фёдор Кулаков, разработчик Lamoda Tech
lamodatech
0
230
ひとり情シスなCTOがLLMと始めるオペレーション最適化 / CTO's LLM-Powered Ops
yamitzky
0
220
米国国防総省のDevSecOpsライフサイクルをAWSのセキュリティサービスとOSSで実現
syoshie
2
620
Amazon Q Developer for GitHubとAmplify Hosting でサクッとデジタル名刺を作ってみた
kmiya84377
0
3.5k
BrainPadプログラミングコンテスト記念LT会2025_社内イベント&問題解説
brainpadpr
0
110
doda開発 生成AI元年宣言!自家製AIエージェントから始める生産性改革 / doda Development Declaration of the First Year of Generated AI! Productivity Reforms Starting with Home-grown AI Agents
techtekt
0
180
Featured
See All Featured
The Straight Up "How To Draw Better" Workshop
denniskardys
233
140k
[RailsConf 2023] Rails as a piece of cake
palkan
55
5.6k
The MySQL Ecosystem @ GitHub 2015
samlambert
251
13k
How to Think Like a Performance Engineer
csswizardry
24
1.7k
Building Flexible Design Systems
yeseniaperezcruz
328
39k
Thoughts on Productivity
jonyablonski
69
4.7k
Measuring & Analyzing Core Web Vitals
bluesmoon
7
480
Side Projects
sachag
455
42k
Rebuilding a faster, lazier Slack
samanthasiow
81
9k
Six Lessons from altMBA
skipperchong
28
3.8k
Designing Experiences People Love
moore
142
24k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
32
2.3k
Transcript
How to use Scala.js in real world? Kyo Ago
About me - work for ChatWork - using JavaScript for
9 years - using Scala for 0.5 year ࣗݾհɻChatWorkͰJavaScriptॻ͍ͯ·͢
Scala is great! Scala͍͍Ͱ͢Ͷʂ
But Ͱ
We want to develop UI, don't we!? UIΛ࡞Γ͍ͨʂ
Hmm... ͡Ό͋
Scala.js!! Scala.jsͰ͢Ͷʂ
Wait ... Ͱ
Scala.js is production ready yet? Scala.js͑Δͷʁ
Yes, it is! ͑Δ
1. "almost" compatible to Javascript JavaScriptͱͷޓੑ΄΅ສશ - bit-size in number
types - runtime semantics in exceptions - difference of regex defs
2. Type definition can be applied by using TypeScript ܕఆٛTypeScript͔ΒಋೖՄೳ
sjrd/scala-js-ts-importer
3. fast compile ߴͳίϯύΠϧ 1-2 seconds even when optimized fullOptJS
is used
4. small footprint ܰྔ Hello world! is 17KB(with fullOptJS). 6KB
with gzip
5. supports SourceMap SourceMapαϙʔτ
6. Java API implementation is going actively Java APIͷ࣮ਐΜͰΔ
Why isn't Scala.js widely used? ͡Ό͋ɺͳΜͰΘΕͯͳ͍ͷʁ
1. type safety is too much for small projects খنͳΒܕ҆શੑͷඞཁੑ͍
2. widely proven framework is preferred in large projects. େنͳΒ࣮͕ͳ͍ϑϨʔϜϫʔΫ࠾༻͠ʹ͍͘
3. difficult to call Scala.js from Javascript JavaScript͔ΒScala.jsΛݺͼग़͢ͷ͕͍͠ The part
actively developed right now
4. difficult to change if html was embedded to code
ίʔυʹhtmlΛຒΊࠐΉͱUIมߋʹऑ͍
5. compatibility/ability to track the latest version between other JavaScript
libraries JavaScriptϥΠϒϥϦͱͷޓੑɺ࠷৽൛ͷैੑ
6. debugging cost on browsers ϒϥβ্Ͱͷσόοάίετ
Then, we can't use, can we!? ͡Ό͋ɺ͑ͳ͍ͷʁ
Architecture can be an answer ΞʔΩςΫνϟͰղܾ
Scala.js should covers only logic. Scala.jsϩδοΫͷΈΛ࣮
Javascript should covers UI JavaScriptͰUIΛ࣮
communicate each other by JSON ͓ޓ͍ʹJSONͰ௨৴
UI should be contsructed by JSON UIJSON͔Βߏங͢Δ
Pros ར
1. reduces integration between Scala.js and JavaScript Scala.jsͱJavaScriptͷ࿈ܞ͕ݮΔ
2. we can develop in Scala.js similar to usual development
in Scala ௨ৗͷScala։ൃͱಉ͡Α͏ʹScala.jsͰ։ൃͰ͖Δ
3. flexibility of implementing UI UI࣮ͷࣗ༝্͕͕Δ
Cons ܽ
1. communication cost between Scala.js and UI Scala.jsͱUI෦ͱͷ௨৴͕සൃ͢Δ
2. logic is prone to be complex ϩδοΫ͕ෳࡶԽ͢Δ
Is this really achievable? ࣮ݱՄೳʁ
Yes, at least on the architecture level ΞʔΩςΫνϟతʹՄೳ
Let's discuss together at ChatWork Booth! ৄ͘͠ϒʔεͰ
Thank you! ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ɻ
We're Hiring!! ͝Ԡื͓͍ͪͯ͠·͢ʂ http://corp.chatwork.com/ja/recruit/engineer/