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
fetchのCancel Abort方法標準化の変遷 / A History of Cance...
Search
tipo159
March 29, 2018
Programming
1
510
fetchのCancel Abort方法標準化の変遷 / A History of Cancel Abort Method Standard
・Cancelable Promise
・AbortController
・Browserの対応状況
・Node.jsの対応状況
tipo159
March 29, 2018
Tweet
Share
More Decks by tipo159
See All by tipo159
Type-safe front-end development using Rust/Rustを使った型安全なフロントエンド開発
tipo159
0
440
ReasonReactとReactのAPIの違い / The Difference between ReasonReact API and React API
tipo159
2
530
REASONの紹介 / Introductory talk about REASON
tipo159
1
390
PWAで何ができるようになるのか / What does PWA do
tipo159
1
970
HNPWAの紹介 / Introductory talk about HNPWA
tipo159
2
640
ES2015 Proxyを使ってみた / Introductory talk about ES2015 Proxy
tipo159
1
640
Webコンポーネント関連の最新動向 / Recent Topics on Web Components
tipo159
0
600
SlackはどうやってBrowserViewに乗り換えたのか / How Slack move from webview to BrowserView
tipo159
2
4.3k
コンポーネント再利用ってどこまでするの? / How to reuse components
tipo159
0
910
Other Decks in Programming
See All in Programming
コードとあなたと私の距離 / The Distance Between Code, You, and I
hiro_y
0
170
CSC509 Lecture 06
javiergs
PRO
0
260
デミカツ切り抜きで面倒くさいことはPythonにやらせよう
aokswork3
0
240
2分台で1500examples完走!爆速CIを支える環境構築術 - Kaigi on Rails 2025
falcon8823
3
3.7k
monorepo の Go テストをはやくした〜い!~最小の依存解決への道のり~ / faster-testing-of-monorepos
convto
2
490
Things You Thought You Didn’t Need To Care About That Have a Big Impact On Your Job
hollycummins
0
230
私はどうやって技術力を上げたのか
yusukebe
43
18k
そのpreloadは必要?見過ごされたpreloadが技術的負債として爆発した日
mugitti9
2
3.4k
Catch Up: Go Style Guide Update
andpad
0
230
iOSエンジニア向けの英語学習アプリを作る!
yukawashouhei
0
200
Devvox Belgium - Agentic AI Patterns
kdubois
1
120
品質ワークショップをやってみた
nealle
0
270
Featured
See All Featured
10 Git Anti Patterns You Should be Aware of
lemiorhan
PRO
657
61k
Learning to Love Humans: Emotional Interface Design
aarron
274
41k
Leading Effective Engineering Teams in the AI Era
addyosmani
5
430
Designing for Performance
lara
610
69k
Balancing Empowerment & Direction
lara
4
690
Build your cross-platform service in a week with App Engine
jlugia
232
18k
GraphQLの誤解/rethinking-graphql
sonatard
73
11k
Keith and Marios Guide to Fast Websites
keithpitt
411
23k
Fantastic passwords and where to find them - at NoRuKo
philnash
52
3.4k
Side Projects
sachag
455
43k
Save Time (by Creating Custom Rails Generators)
garrettdimon
PRO
32
1.6k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
140
34k
Transcript
fetchͷCancel/Abortํ๏ඪ४Խͷมભ Meguro.es #14 2018.3.29 tipo159
ΞδΣϯμ • Cancelable Promise (2015.4.10 - 2016.12.16) • AbortController (2017.1.5
- ) • BrowserͷରԠঢ়گ • Node.jsͷରԠঢ়گ 2
Cancelable Promise (2015.4.10 - 2016.12.16) • JavaScriptͷPromise༷ͷՃ • ओͳ༰ •
cancelΛresolve, rejectͱҧ͏ୈ3ͷঢ়ଶͱͯ͠Ճ • .NETͰΘΕ͍ͯͨCancel TokenΛͬͯΩϟϯηϧ • Domenic Denicola(Googleࣾһ)͕ɼ2016.12.16ʹGoogle ෦ͷରͷͨΊऔΓԼ͛(ৄࡉෆ໌) https://github.com/tc39/proposal-cancelable-promises 3
Cancelable Promiseͷαϯϓϧ async function f(cancelToken) { await a(); cancelToken.cancelIfRequested(); await
b(); } const ct = new CancelToken(cancel => { cancelButton.onclick = cancel; }); f(ct); // NOTE: will be canceled if they click the cancel button 4
AbortController (2017.1.5 - ) • ࠷ॳPromise༷ͷՃΛࢦ͍͕ͯͨ͠ɼDOM༷ ʹՃ͞Εͨ • ओͳ༰ •
AbortControllerΦϒδΣΫτΛͬͯΞϘʔτ • PromiseͷػೳՃͳ͠ • fetchҎ֎ʹద༻Մೳ • WHATWGͷDOM༷ʹՃࡁΈ https://dom.spec.whatwg.org/ 5
AbortControllerͷྫ var controller = new AbortController(); var signal = controller.signal;
var downloadBtn = document.querySelector('.download'); var abortBtn = document.querySelector('.abort'); downloadBtn.addEventListener('click', fetchVideo); abortBtn.addEventListener('click', function() { controller.abort(); console.log('Download aborted'); }); function fetchVideo() { ... fetch(url, {signal}).then(function(response) { ... }).catch(function(e) { reports.textContent = 'Download error: ' + e.message; }) } 6
BrowserͷରԠঢ়گ • αϙʔτࡁΈ • Chrome 66 • Edge 16 •
Firefox 57 • ະαϙʔτ • Safari (Technology Preview 42 2017.10.18ʙ ਖ਼ࣜαϙʔτະ) 7
Node.jsͷରԠঢ়گ • Node.jsʹDOMؔ࿈API͕ͳ͍ͨΊ༻ෆՄ • polyfillΛ͑༻Մೳ https://www.npmjs.com/package/abortcontroller-polyfill 8