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
20250707-AI活用の個人差を埋めるチームづくり
shnjtk
6
3.9k
How Do I Contact HP Printer Support? [Full 2025 Guide for U.S. Businesses]
harrry1211
0
120
United Airlines Customer Service– Call 1-833-341-3142 Now!
airhelp
0
170
開発生産性を測る前にやるべきこと - 組織改善の実践 / Before Measuring Dev Productivity
kaonavi
12
5.2k
事業成長の裏側:エンジニア組織と開発生産性の進化 / 20250703 Rinto Ikenoue
shift_evolve
PRO
3
22k
インフラ寄りSREの生存戦略
sansantech
PRO
0
330
OPENLOGI Company Profile
hr01
0
67k
第4回Snowflake 金融ユーザー会 Snowflake summit recap
tamaoki
1
290
改めてAWS WAFを振り返る~業務で使うためのポイント~
masakiokuda
2
270
Lufthansa ®️ USA Contact Numbers: Complete 2025 Support Guide
lufthanahelpsupport
0
200
AI専用のリンターを作る #yumemi_patch
bengo4com
6
4.3k
生成AI開発案件におけるClineの業務活用事例とTips
shinya337
0
260
Featured
See All Featured
For a Future-Friendly Web
brad_frost
179
9.8k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
233
17k
Save Time (by Creating Custom Rails Generators)
garrettdimon
PRO
31
1.3k
Designing Experiences People Love
moore
142
24k
Rails Girls Zürich Keynote
gr2m
95
14k
Typedesign – Prime Four
hannesfritz
42
2.7k
Facilitating Awesome Meetings
lara
54
6.4k
Writing Fast Ruby
sferik
628
62k
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
50
5.5k
Into the Great Unknown - MozCon
thekraken
40
1.9k
The Straight Up "How To Draw Better" Workshop
denniskardys
234
140k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
34
5.9k
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/