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
Codestock 2018: Building a Resilient, API-drive...
Search
Jeremy Fairbank
April 20, 2018
Programming
0
260
Codestock 2018: Building a Resilient, API-driven Front-End with Elm
Jeremy Fairbank
April 20, 2018
Tweet
Share
More Decks by Jeremy Fairbank
See All by Jeremy Fairbank
Connect.Tech 2020: Advanced Cypress Testing
jfairbank
1
210
CodeMash 2020: Solving the Boolean Identity Crisis
jfairbank
1
150
CodeMash 2020: Practical Functional Programming
jfairbank
1
320
Connect.Tech 2019: Practical Functional Programming
jfairbank
0
360
Connect.Tech 2019: Solving the Boolean Identity Crisis
jfairbank
0
180
Lambda Squared 2019: Solving the Boolean Identity Crisis
jfairbank
0
120
All Things Open 2018: Practical Functional Programming
jfairbank
2
260
Connect.Tech 2018: Effective React Testing
jfairbank
1
160
Fluent Conf 2018: Building web apps with Elm Tutorial
jfairbank
2
860
Other Decks in Programming
See All in Programming
20250808_AIAgent勉強会_ClaudeCodeデータ分析の実運用〜競馬を題材に回収率100%の先を目指すメソッドとは〜
kkakeru
0
200
大規模FlutterプロジェクトのCI実行時間を約8割削減した話
teamlab
PRO
0
490
CSC305 Summer Lecture 06
javiergs
PRO
0
100
私の後悔をAWS DMSで解決した話
hiramax
4
130
TROCCO×dbtで実現する人にもAIにもやさしいデータ基盤
nealle
0
330
書き捨てではなく継続開発可能なコードをAIコーディングエージェントで書くために意識していること
shuyakinjo
1
310
あのころの iPod を どうにか再生させたい
orumin
2
2.5k
サーバーサイドのビルド時間87倍高速化
plaidtech
PRO
0
480
モバイルアプリからWebへの横展開を加速した話_Claude_Code_実践術.pdf
kazuyasakamoto
0
260
Terraform やるなら公式スタイルガイドを読もう 〜重要項目 10選〜
hiyanger
13
3.2k
自作OSでDOOMを動かしてみた
zakki0925224
1
1.4k
Claude Codeで挑むOSSコントリビュート
eycjur
0
180
Featured
See All Featured
The Cult of Friendly URLs
andyhume
79
6.5k
How to train your dragon (web standard)
notwaldorf
96
6.2k
How To Stay Up To Date on Web Technology
chriscoyier
790
250k
Site-Speed That Sticks
csswizardry
10
780
Making the Leap to Tech Lead
cromwellryan
134
9.5k
The Straight Up "How To Draw Better" Workshop
denniskardys
236
140k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
29
2.8k
Navigating Team Friction
lara
189
15k
Documentation Writing (for coders)
carmenintech
73
5k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
8
890
Optimising Largest Contentful Paint
csswizardry
37
3.4k
Transcript
Building a Resilient, API-driven Front-End with Elm Jeremy Fairbank @elpapapollo
@testdouble helps improves how the world build software. testdouble.com/agency
In beta now! bit.ly/programming-elm
const axios = require('axios') const fetchAlbum = name => axios.get(`/albums/${name}`)
.then(({ data }) => data) const printAlbum = ({ name, artists }) => console.log(`${name} by ${artists.join(' - ')}`)
const axios = require('axios') const fetchAlbum = name => axios.get(`/albums/${name}`)
.then(({ data }) => data) const printAlbum = ({ name, artists }) => console.log(`${name} by ${artists.join(' - ')}`)
const axios = require('axios') const fetchAlbum = name => axios.get(`/albums/${name}`)
.then(({ data }) => data) const printAlbum = ({ name, artists }) => console.log(`${name} by ${artists.join(' - ')}`)
fetchAlbum('blue train') .then(printAlbum) // undefined by John Coltrane
fetchAlbum('blue train') .then(printAlbum) // undefined by John Coltrane
{ "title": "Blue Train", "artists": ["John Coltrane"] } const printAlbum
= ({ name, artists }) => console.log(`${name} by ${artists.join(' - ')}`)
{ "title": "Blue Train", "artists": ["John Coltrane"] } const printAlbum
= ({ name, artists }) => console.log(`${name} by ${artists.join(' - ')}`)
const printAlbum = ({ title, artists }) => console.log(`${title} by
${artists.join(' - ‘)}`) fetchAlbum('blue train') .then(printAlbum) // Blue Train by John Coltrane
const printAlbum = ({ title, artists }) => console.log(`${title} by
${artists.join(' - ‘)}`) fetchAlbum('blue train') .then(printAlbum) // Blue Train by John Coltrane
const printAlbum = ({ title, artists }) => console.log(`${title} by
${artists.join(' - ‘)}`) fetchAlbum('blue train') .then(printAlbum) // Blue Train by John Coltrane
fetchAlbum('blue trane') .then(printAlbum)
fetchAlbum('blue trane') .then(printAlbum)
fetchAlbum('blue trane') .then(printAlbum)
fetchAlbum('blue trane') .then(printAlbum) .catch(e => console.error(e))
None
1. State management 2. Code organization 3. Data type guarantees
4. Null and undefined 5. JSON data contracts 6. Error handling 7. Primitive obsession Resiliency Problems
1. State management 2. Code organization 3. Data type guarantees
4. Null and undefined 5. JSON data contracts 6. Error handling 7. Primitive obsession Resiliency Problems
1. State management 2. Code organization 3. Data type guarantees
4. Null and undefined 5. JSON data contracts 6. Error handling 7. Primitive obsession Resiliency Problems
1. State management 2. Code organization 3. Data type guarantees
4. Null and undefined 5. JSON data contracts 6. Error handling 7. Primitive obsession Resiliency Problems
1. State management 2. Code organization 3. Data type guarantees
4. Null and undefined 5. JSON data contracts 6. Error handling 7. Primitive obsession Resiliency Problems
1. State management 2. Code organization 3. Data type guarantees
4. Null and undefined 5. JSON data contracts 6. Error handling 7. Primitive obsession Resiliency Problems
1. State management 2. Code organization 3. Data type guarantees
4. Null and undefined 5. JSON data contracts 6. Error handling 7. Primitive obsession Resiliency Problems
elm
Compiles to JavaScript
No runtime exceptions in practice.
No undefined is not a function
Back to our problems…
Update View Model Messages The Elm Architecture
Application State Model
Model Virtual DOM View UI as a Function
Messages Standardized application events
elm app model
elm app model Events Text Input Mouse Click Associate message
with event
elm app model Events Text Input Mouse Click When event
triggers (i.e. user clicks), deliver message
Update Model New Model Respond to messages and create new
state
model Update View
model Update View
model Update View VDOM
model Update View VDOM
model Update View Select red color
model Update View Select red color
model Update View Select red color
model Update View
model Update View
model Update View
model Update View VDOM
model Update View VDOM
Demo
None
The Elm Architecture 1. State management 2. Code organization
The Elm Architecture 1. State management 2. Code organization Static
Types 3. Data type guarantees
The Elm Architecture 1. State management 2. Code organization Static
Types 3. Data type guarantees Maybe 4. Null and undefined
The Elm Architecture 1. State management 2. Code organization Static
Types 3. Data type guarantees Maybe 4. Null and undefined JSON Decoders 5. JSON data contracts
The Elm Architecture 1. State management 2. Code organization Static
Types 3. Data type guarantees Maybe 4. Null and undefined JSON Decoders 5. JSON data contracts Result 6. Error handling
The Elm Architecture 1. State management 2. Code organization Static
Types 3. Data type guarantees Maybe 4. Null and undefined JSON Decoders 5. JSON data contracts Result 6. Error handling Explicit State / Union Types 7. Primitive obsession
Thanks! Jeremy Fairbank @elpapapollo Slides: bit.ly/resilient-elm-codestock Code: bit.ly/resilient-elm-code-codestock Book: bit.ly/programming-elm