Scalable, Ambitious, Future-friendly web apps with Ember.js

Emberjs is an opinionated web UI framework focused on developer productivity. I will introduce the basics of the framework, and provide several examples of where ember saves an unprecedented amount of time for dev teams. Additionally, I'll cover ember-cli, the extensible build tool that the Emberjs and Angular communities are depending on for code generation, asset compilation, and running tests

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1. Mike North Levanto Financial, Inc. Ember.js – Modern, Scalable, Ambitious Apps
6. JS UI LIBRARIES 99 2000 01 02 03 04 05 06 07 08 09 2010 11 12 13 14 15 16 17 2 2 6 7 8 9 10 11 12 ES3 ES5 @MichaelLNorth
7. NOW IMAGINE… • All the micro-libraries • All the build tools • All the pre-processors and post-processors • All of the permutations with typescript, babel, etc…
8. “BEST IN CLASS” OPTIONS FROM EACH CATEGORY?
10. WHAT ARE SOME OF THE MODERN CHOICES?
13. What our users need us to build
14. What we’re sometimes tempted to build
15. What our users need us to build
16. THE EMBER ECOSYSTEM ember-cli Code Generation Asset Pipeline Plugins Extensible CLI Test Runner ember.js SPA routing Components Templating Data Binding Prioritized Work Queue ember-data Request Construction JSON Serialization Redux-like Data Flow Async Relationships liquid-fire animations ember-collection virtualized list
17. THE EMBER ECOSYSTEM • Built on strong conventions & opinions • Focus on developer productivity • Aligned with web standards • Abstractions hold up w/ large scale & complexity • Constantly improving
18. TEMPLATING • Handlebars • Declarative markup, an extension of HTML • Compiled at build time • Extensible Hello, <strong> {{firstName}} {{lastName}} </strong>!
19. define('examples/templates/index', ['exports'], function (exports) { 'use strict'; exports['default'] = Ember.HTMLBars.template((function() { return { ... buildFragment: function buildFragment(dom) { var el0 = dom.createDocumentFragment(); var el1 = dom.createTextNode("Hello, "); dom.appendChild(el0, el1); var el1 = dom.createElement("strong"); var el2 = dom.createComment(""); dom.appendChild(el1, el2); var el2 = dom.createTextNode(" "); dom.appendChild(el1, el2); var el2 = dom.createComment(""); dom.appendChild(el1, el2); dom.appendChild(el0, el1); var el1 = dom.createTextNode("!"); dom.appendChild(el0, el1); return el0; }, buildRenderNodes: function buildRenderNodes(dom, fragment, contextualElement) { var element0 = dom.childAt(fragment, [1]); var morphs = new Array(2); morphs[0] = dom.createMorphAt(element0,0,0); morphs[1] = dom.createMorphAt(element0,2,2); return morphs; }, statements: [ ["content","firstName",["loc",[null,[1,15],[1,28]]]], ["content","lastName",["loc",[null,[1,29],[1,41]]]] ], ... }; }())); });
20. TEMPLATING • Helpers • Block vs inline form • Easy to read and reason about My pet goes {{#if isDog}} arf {{else}} meow {{/if}} My pet goes {{if isDog "arf" "meow"}}
21. My pet goes {{if isDog "arf" "meow"}} function ifHelper(condition, ifTrue, ifFalse) { return condition ? ifTrue : ifFalse } {{#if isEnabled}} <b>Switch is enabled</b> {{/if}} function ifHelper(condition, callbackIfTrue) { return condition ? callbackIfTrue() : ''; }
22. <ul> {{#each arr as |item|}} <li>{{item.name}}</li> {{/each}} </ul> function eachHelper(array, cb) { return array .map(item => cb(item)) .join(''); }
23. ROUTING • Router - Finite State Machine • Routes - Manage transitions between states • URLs drive your app this is a core pillar of Ember
24. ROUTING ember routing URL changes components templates HTML++ ember-data store adapter makes requests serializer transforms JSON Talks to API
25. application index application posts post author comments index index index index index / URL:
26. application posts posts/index application posts post author comments index index index index index /posts/ URL:
27. application post post/index application posts post author comments index index index index index /post/31 URL:
28. application post application posts post author comments index index index index index {{outlet}} /post/31/comments/ URL:
29. application post application posts post author comments index index index index index post/comments post/comments/index /post/31/comments/ URL:
30. COMPONENTS How many of you have been using some type of web component for > 5 years?
31. COMPONENTS
32. <my-widget title='Enter your Info'> <my-field name='Username'/> <my-field name='Password'/> </my-widget>
33. W3C WEB COMPONENT SPEC IS INCOMPLETE!
34. …AND THIS IS A GOOD THING WEB UI LIBS ARE JUST A GIANT SERIES OF HACKS
35. TC39
36. <my-widget title='Enter your Info'> <my-field name='Username'/> <my-field name='Password'/> </my-widget> {{#my-widget title='Enter your Info’}} {{my-field name=‘Username’}} {{my-field name=‘Password’}} {{/my-widget}}
37. init on instantiation willInsertElement before the component’s element is inserted into the DOM didInsertElement after the component’s element has been inserted into the DOM willDestroyElement before the component’s element is removed from the DOM $(document).ready() for components Clean up before tear down EMBER.COMPONENT
38. EMBER-DATA • Unidirectional data flow, single atom of state • Can talk to any API • Moves data massaging out of your business logic • Built around fetch (important for SS rendering!) • Saves tons of time if your API uses consistent conventions
39. EMBER-DATA: MODEL • Representation of any (usually persistent) data • Defined by attributes, and relationships to other models • “model” is the factory that defines the structure of “records” // app/models/book.js import DS from 'ember-data'; const { attr, hasMany } = DS; export default DS.Model.extend({ title: attr('string'), publishedAt: attr('date'), chapters: hasMany('chapter') });
40. EMBER-DATA: STORE • Where you get/create/destroy records • A single source of truth • This means that all changes are kept in sync! • Similar concept in Facebook/flux, angular-data
41. EMBER-DATA: STORE // (maybe) API request for all records of type "author" this.store.findAll('author'); // (maybe) API request for record of type "post" with id 37 this.store.findRecord('post', 37); // API request for all records of type "author" this.store.fetchAll('author'); // API request for record of type "post" with id 37 this.store.fetchRecord('post', 37); // look in cache for all records of type "author" this.store.peekAll('author'); // look in cache for record of type "post" with id 37 this.store.peekRecord('post', 37);
42. EMBER-DATA: ADAPTER export default DS.RESTAdapter.extend({ host: 'https://api.github.com', urlForQuery (query, modelName) { switch(modelName) { case 'repo': return `${this.get('host')}/orgs/${query.orgId}/repos`; default: return this._super(...arguments); } } });
43. EMBER-DATA: SERIALIZER export default DS.RESTSerializer.extend({ normalizeResponse(store, modelClass, payload, id, requestType){ const newPayload = { org: payload }; return this._super(store, modelClass, newPayload, id, requestType); } });
44. EMBER-CLI
45. ADOPTION
47. RECENT DEVELOPMENTS
48. FASTBOOT
49. ENGINES
50. GLIMMER 2
51. …AND MORE…
52. THANKS! COME TO THE EMBER.JS WORKSHOP!