Un-dux Your Front-End - Speaker Deck

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6O%VY:PVS'SPOU&OE /BUF"CFMF "EWJTPS*OOPWBUJPO-BCT

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UN-DUX YOUR FRONT-END NATE ABELE

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THE UNREASONABLE EFFECTIVENESS OF DATA OR…

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UN-DUX YOUR FRONT-END YOUR HOST: NATE ABELE ▸ Some PHP frameworks (Li3, CakePHP) ▸ AngularUI Router ▸ Architect @ AI Labs ▸ @nateabele ▸ [email protected]

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UN-DUX YOUR FRONT-END ADVISOR INNOVATION LABS

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CONCEPTS

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STATE

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< Component /> < Component /> < Component /> < Component /> < Component /> < Component />

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< Component /> < Component /> < Component /> < Component /> < Component /> < Component />

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UN-DUX YOUR FRONT-END REDUX ▸ Single-value store ▸ Changes (actions) are simple values ▸ Few opinions

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SETTING UP $ yarn add redux react-redux react-router-redux redux-logger redux-saga redux-mock-store redux-immutable redux-thunk redux-promise-middleware react-redux-form redux-act redux-saga-test-plan redux-query redux-saga-async ...

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function todoApp(state = initialState, action) { switch (action.type) { case SET_VISIBILITY_FILTER: return Object.assign({}, state, { visibilityFilter: action.filter }) default: return state } }

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ELM ELM

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CASIUM

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import React from 'react'; import { container } from 'casium'; import Message from 'casium/message'; class Increment extends Message {} class Decrement extends Message {} export default container({ init: () => ({ count: 0 }), update: [ [Increment, ({ count }) => ({ count: count + 1 })], [Decrement, ({ count }) => ({ count: count - 1 })] ], view: ({ emit, count }) => (

- { count } +

) });

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RAMDAJS

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import React from 'react'; import { evolve } from 'ramda'; import { container } from 'casium'; import Message from 'casium/message'; class Increment extends Message {} class Decrement extends Message {} export default container({ init: () => ({ count: 0 }), update: [ [Increment, evolve({ count: ct => ct + 1 })], [Decrement, evolve({ count: ct => ct - 1 })] ], view: ({ emit, count }) => (

- { count } +

) });

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- { count } +

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import React from 'react'; import { evolve, inc, dec } from 'ramda'; import { container } from 'casium'; import Message from 'casium/message'; class Increment extends Message {} class Decrement extends Message {} export default container({ init: () => ({ count: 0 }), update: [ [Increment, evolve({ count: inc })], [Decrement, evolve({ count: dec })] ], view: ({ emit, count }) => (

- { count } +

) });

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import { merge } from 'ramda'; /* … */ class UpdateForm extends Message {} export default container({ init: () => ({ email: '', password: '' }), update: [[ UpdateForm, (model, { key, value }) => merge(model, { [key]: value }) ]], view: ({ emit, email, password }) => ( ) });

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import { Http } from 'casium/commands'; /* … */ class SignInSubmit extends Message {} class SignInSuccess extends Message {} class SignInError extends Message {} export default container({ init: () => ({ email: '', password: '', loading: false }), update: [ [UpdateForm, (model, { key, value }) => /* … */], [SignInSubmit, model => [ merge(model, { loading: true }), new Http.Post({ url: '/login', data: { email: model.email, password: model.password }, result: SignInSuccess, error: SignInError }) ]] ], view: ({ emit, email, password }) => ( /* … */ ) });

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import { Http } from 'casium/commands'; /* … */ class SignInSuccess extends Message {} class SignInError extends Message {} export default container({ init: () => ({ email: '', password: '', loading: false }), update: [ /* … */ [SignInSuccess, (model, { data }) => /* Handle the response… */] [SignInError, (model, { status }) => /* Handle error… */] ], view: ({ emit, email, password }) => ( /* … */ ) });

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import { Post, formData } from 'casium/commands/http'; export default class SignIn extends Post { constructor({ email, password, ...params }) { const id = 'my-app', secret = 'woo-sekrit'; super({ url: '/oauth/token', headers: { 'Content-Type': 'application/x-www-form-urlencoded', 'Authorization': 'Basic ' + btoa(id + ':' + secret) }, data: formData({ username: email, password, grant_type: 'password', scope: 'read write', client_secret: secret, client_id: id }), ...params }); } }

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import { Post, formData } from 'casium/commands/http'; import { SignInSuccess, SignInError } from './sign_in_container'; export default class SignIn extends Post { constructor({ email, password, ...params }) { const id = 'my-app', secret = 'woo-sekrit'; super({ url: '/oauth/token', headers: { 'Content-Type': 'application/x-www-form-urlencoded', 'Authorization': 'Basic ' + btoa(id + ':' + secret) }, data: formData({ username: email, password, grant_type: 'password', scope: 'read write', client_secret: secret, client_id: id }), result: SignInSuccess, error: SignInError ...params }); } }

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import { Http } from 'casium/commands'; /* … */ export default container({ init: () => ({ email: '', password: '', loading: false }), update: [ /* … */ [SignInSubmit, model => [ merge(model, { loading: true }), new Http.Post({ url: '/login', data: { email: model.email, password: model.password }, result: SignInSuccess, error: SignInError }) ]] ], view: ({ emit, email, password }) => ( /* … */ ) });

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import { SignIn } from ‘./messages/sign_in’; /* … */ export default container({ init: () => ({ email: '', password: '', loading: false }), update: [ /* … */ [SignInSubmit, model => [ merge(model, { loading: true }), new SignIn({ email: model.email, password: model.password }) ]] ], view: ({ emit, email, password }) => ( /* … */ ) });

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import { SignIn } from ‘./messages/sign_in’; import { container, seq } from 'casium'; /* … */ export default container({ init: () => ({ email: '', password: '', loading: false }), update: [ /* … */ [SignInSubmit, seq( model => merge(model, { loading: true }), model => [model, new SignIn({ email: model.email, password: model.password })] )] ], view: ({ emit, email, password }) => ( /* … */ ) });

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import { merge, pick } from 'ramda'; import { SignIn } from ‘./messages/sign_in’; import { container, seq, replace, commands } from 'casium'; /* … */ export default container({ init: () => ({ email: '', password: '', loading: false }), update: [ /* … */ [SignInSubmit, seq( replace({ loading: true }), commands(SignIn, pick(['email', 'password'])) )] ], view: ({ emit, email, password }) => ( /* … */ ) });

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WHY?

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TESTING

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describe('+', () => { /* … */ });

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GUARANTEES

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EXAMPLE: PROMISES

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‘PROBABLY’

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$ git checkout b69c907

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$ yarn test

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[DEMO]

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UN-DUX YOUR FRONT-END REVIEW ▸ Diff view of changes ▸ Generated unit tests ▸ Time travel ▸ Message log export ▸ Websockets magic

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UN-DUX YOUR FRONT-END IMPLICATIONS ▸ Crossing boundaries ▸ Device farm ▸ Reproduce production errors ▸ Watch / replay user sessions ▸ Isolation ▸ Browser testing ▸ API testing

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UN-DUX YOUR FRONT-END IMPLICATIONS ▸ Diff analysis

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UN-DUX YOUR FRONT-END Sign Up.json Log In.json Set Prefs.json

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UN-DUX YOUR FRONT-END Sign Up.json Log In.json Set Prefs.json

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$ webpack my-app.js > my-app-df3db62731a0a32ef0c6.js

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UN-DUX YOUR FRONT-END df3db6273 +

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UN-DUX YOUR FRONT-END Sign Up.json Log In.json + + df3db6273 df3db6273

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UN-DUX YOUR FRONT-END TRY CASIUM ▸ /ai-labs-team/casium ▸ /ai-labs-team/casium-devtools ▸ casium.io

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THANKS!

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QUESTIONS?

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UN-DUX YOUR FRONT-END CONTACT ▸ /nateabele ▸ @nateabele ▸ [email protected]

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PHOTO CREDITS ▸ ‘This is not a pipe’: https://www.threadless.com/product/543/this_is_not_a_pipe ▸ ‘Cow’: https://www.emaze.com/@AWCTOFZ ▸ ‘Steak’: http://www.chicagomeat.com/products/t-bone-steak/ ▸ ‘McDonald’s Hamburger’: https://www.businessinsider.com.au/man-saves-mcdonalds- burger-for-5-years-2014-7 ▸ ‘Texas’: http://yalsa.ala.org/blog/2014/02/25/virtual-road-trip-texas-part-2/ ▸ ‘DeLorean’: https://www.pinterest.com/pin/114419646753355072/ ▸ ‘Redux Architecture’: https://medium.com/mofed/react-redux-architecture- overview-7b3e52004b6e