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Mind the Front-End Gap: Navigating the Path from
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cball_ Chris Ball Ǧ
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This talk is NOT… cball_
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Not to debate front-end frameworks. cball_
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Not to debate server-side alternatives. cball_
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Not to convince Sam Phippen to use SPA's. cball_
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Here's a quick pitch. (maybe this is you?) cball_
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❤ cball_
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conventions. ❤ cball_
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conventions. ❤ cball_
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Therefore cball_
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❤ cball_
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Conventions give us superpowers. http://realitypod.com/wp-content/uploads/2011/03/super-strength.jpg
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Productivity++ cball_
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Great Tooling (you're used to this) rails serve rails test rails generate rails new bundle gem cball_
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Great Tooling ember-cli will feel familiar! ember serve ember test ember generate ember new ember addon cball_
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ember s ember t ember g ember new ember addon cball_ Great Tooling ember-cli will feel familiar!
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Much of what you know has direct equivalents. cball_
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cball_ Router Model View ActiveRecord Gems Controller Router Model Template Ember Data Addons Route
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cball_ link_to yield things.each do |t| helpers pluralize link-to outlet each things as |t| helpers pluralize
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The Ember Inspector
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Easily handle complicated async javascript in tests. cball_
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visit('/'); click('.button'); fillIn('.name', 'Chris'); click('.another'); andThen(()=> { let something = $('h2').text(); assert.equal(something, 'yay'); }); cball_
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Get that “$@#% that’s awesome!” moment you got learning Rails. cball_
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Necessary mindset adjustments. cball_
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Request + Response. cball_ ɂ Ȑ
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All the things are rebuilt on every request. cball_
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Keep memory in mind. cball_
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Great browser-provided tools cball_
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Controllers fetch data. cball_ class SongController def show @song = Song.find(params[:id]) end end
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Routes fetch data. cball_ // app/routes/song.js export default Ember.Route.extend({ model(params) { return this.store.findRecord('song', params.id); } });
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Routes fetch data. cball_ {{! app/templates/song.hbs }} My amazing song is {{model.name}}
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Rendering is slow. Does this look familiar? Completed 200 OK in 1749ms (Views: 1725.7ms | ActiveRecord: 23.3ms) cball_
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Caching is the only way to speed it up. cball_
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Rendering is fast! New rendering engine based on lessons learned from React.
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JavaScript is something to sprinkle in. cball_
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On JavaScript heavy pages, what happens if user refreshes?
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They start over.
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Focus on URLs. Ember Router maps URL to application state. Helps avoid the refresh issue. cball_
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Rails manages assets. cball_ css js images
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Asset Pipeline = Ember will handle assets during the build process before deploying. cball_
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Nest related API resource URLs. cball_
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/users/23/songs/11 cball_
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/users/:user_id/songs/:song_id cball_ (shouldn't have to pass this to fetch single song)
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Keep resource API urls as flat as possible. cball_
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Run jQuery hooks on page load. cball_
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Components. cball_
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cball_ {{#each model as |post|}} {{#blog-post title=post.title}} {{post.body}} {{/blog-post}} {{/each}} Components.
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cball_
{{title}}
{{yield}}
Edit title: {{input type="text" value=title}}
Components.
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Use jQuery code only in a component's didInsertElement hook. cball_
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Always, always add corresponding willDestroyElement hook. cball_
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If you use Bootstrap, don't blindly include their JavaScript. cball_
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cball_ "I JavaScript!"
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It's a little better with CoffeeScript. cball_
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Learn to JavaScript. cball_
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Don't use CoffeeScript. cball_
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ES6 support out of the box Eliminates the need for CoffeeScript and adds additional features. http:/babeljs.io
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It's not enjoyable because you've fought with it. cball_
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Lean on Ember's conventions instead of fighting. cball_
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Use accepts_nested_attributes_for. cball_
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Forget about accepts_nested_attributes_for. cball_
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Make an ajax request that returns JavaScript to update a snippet in a view. cball_
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js.erb cball_
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cball_ Templates are bound, so values update automatically.
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Parts of mindset to keep? cball_
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You'd be surprised at how many concepts still apply. cball_
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cball_ Small methods Collaborator objects SRP things hard = doing wrong TDD generators Acceptance tests Unit tests addons = gems blocks, yield CRUD Refactoring Brain ENV config reopen class DDAU = pass messages
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Too long, didn't listen. cball_ more code!
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What might change in your daily workflow? cball_
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UI first. API after. cball_
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Development cball_
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2 separate repositories. cball_
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Run both Rails server and Ember server for your app. cball_
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Continuous Integration cball_
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You'll be running test suites for 2 apps. cball_
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Deployment cball_
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cball_ Heroku ember-cli buildpack - API_URL will set nginx proxy - Requires 2 heroku apps https://github.com/tonycoco/heroku-buildpack-ember-cli
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cball_ ember-cli-deploy By default, Rails serves index.html from Redis, assets from S3. http://ember-cli.github.io/ember-cli-deploy
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cball_ capistrano Can be set to deploy front-end and back-end separately. http://capistranorb.com
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Final thoughts cball_
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Ember is a brave, new world that's actually familiar. cball_
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Keep using Rails for a great API and for what makes your app special. cball_
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Start enjoying front-end development. cball_
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cball_ ❤
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cball_ https://thisthatandtheotherthang.wordpress.com/tag/fun-facts/ http://www.amazon.com/Matryoshka-Madness-13001-Ninja/dp/B003EED2LS Image Credits http://www.carbonated.tv/lifestyle/6-funny-dog-faces-to-get-your-day-started http://www.flaticon.com/free-icon/woman-head-side-silhouette_40809
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cball_ Thanks!