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
The ECMAScript formerly known as 6
Search
Kerrick Long
July 31, 2015
Programming
0
1.2k
The ECMAScript formerly known as 6
Kerrick Long
July 31, 2015
Tweet
Share
More Decks by Kerrick Long
See All by Kerrick Long
15 Things You Shouldn't Do In Ember Anymore
kerrick
0
1.1k
CSS Study Group 1
kerrick
0
1.1k
CSS Study Group 2
kerrick
1
1k
Services & Component Collaboration
kerrick
0
740
Donate STL #Build4STL Hackathon Keynote
kerrick
0
300
Donate STL
kerrick
0
810
TDD With Ember.js
kerrick
0
1k
JavaScript Promises - Thinking Sync in an Async World
kerrick
20
7.4k
Other Decks in Programming
See All in Programming
Introduction to GitOps
hwchiu
0
110
Webエディタライブラリ 「CodeMirror」から学ぶ Webアプリ開発のテクニック
ryosukeigarashi
0
250
Product Management LT会_クアンド新家
shinshin
0
210
AWS CDKにおける「再利用性」を考える / aws-cdk-reusability
gotok365
6
1.3k
3 Effective Rules for Success with Signals in Angular
manfredsteyer
PRO
0
120
Jetpack for KMP
fornewid
1
290
Terraformテスト入門
msato
0
530
ドメイン駆動設計の実践
masuda220
PRO
17
5.2k
CSC307 Lecture 12
javiergs
PRO
0
220
CSC307 Lecture 14
javiergs
PRO
0
220
How to use Macrobenchmark
veronikapj
0
160
Temporalを取り巻く仕様を整理する
sajikix
0
110
Featured
See All Featured
Intergalactic Javascript Robots from Outer Space
tanoku
266
26k
10 Git Anti Patterns You Should be Aware of
lemiorhan
652
58k
For a Future-Friendly Web
brad_frost
173
9.2k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
226
52k
Typedesign – Prime Four
hannesfritz
37
2.2k
Making Projects Easy
brettharned
111
5.7k
How STYLIGHT went responsive
nonsquared
93
5k
4 Signs Your Business is Dying
shpigford
178
21k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
228
16k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
26
2.1k
Teambox: Starting and Learning
jrom
130
8.6k
Adopting Sorbet at Scale
ufuk
71
8.8k
Transcript
babeljs.io/repl
The ECMAScript formerly known as 6
KerrickLong Kerrick KerrickLong.com
JS
JS
DOM ECMAScript +
DOM
context.drawImage(new Image(), 0, 0) event.dataTransfer.setData(mime, data) new Worker('thread.js').postMessage(str) navigator.getUserMedia({audio: true})
DOM
DOM ECMAScript +
ECMAScript
ECMAScript for (var i; i < 10; i++) { break;
} (function(x) { return x + 1; })(100) var bareObject = Object.create(null) [1, 2, 3, 4].map(double).reduce(add)
ECMAScript 6
ECMAScript 2015
JavaScript is growing up.
Dwindling use of App Frameworks that compile to JS
Dwindling use of App Frameworks that compile to JS
Dwindling use of Other Languages that compile to JS
Dwindling use of Other Languages that compile to JS
What’s new?
Modules
// app/routes/example.js import Ember from 'ember'; export default Ember.Route.extend();
Modules
// app/utils/func.js export var flatten = _.flatten.bind(_); export var union
= _.union.bind(_); Modules
// app/utils/func.js export var flatten = _.flatten.bind(_); export var union
= _.union.bind(_); export default { flatten: flatten, union: union }; Modules
Modules import Ember from 'ember'; import { flatten, union }
from 'app/utils/func'; export default Ember.Route.extend({ model: function() { return flatten(union([1, 2, 3])); } });
Arrow Functions
Arrow Functions var _this = this; return this.store.find('pages').then(function(pages) { return
pages.map(function(pages, i) { return _this.modelFor('posts').objectAt(i) }); });
Arrow Functions var _this = this; return this.store.find('pages').then(pages => {
return pages.map((pages, i) => { return _this.modelFor('posts').objectAt(i) }); });
Arrow Functions return this.store.find('pages').then(pages => { return pages.map((pages, i)
=> { return this.modelFor('posts').objectAt(i) }); });
Arrow Functions return this.store.find('pages').then(pages => { return pages.map((pages, i)
=> this.modelFor('posts').objectAt(i)); });
Enhanced Object Literals
var foo = 'bar'; var obj = { foo: foo,
model: function(params) { return params; } }; obj['id_' + Math.random()] = 'secret'; Enhanced Object Literals
var foo = 'bar'; var obj = { foo, model:
function(params) { return params; } }; obj['id_' + Math.random()] = 'secret'; Enhanced Object Literals
var foo = 'bar'; var obj = { foo, model(params)
{ return params; } }; obj['id_' + Math.random()] = 'secret'; Enhanced Object Literals
var foo = 'bar'; var obj = { foo, model(params)
{ return params; }, ['id_' + Math.random()]: 'secret' }; Enhanced Object Literals
Destructuring
import Ember from 'ember'; var Route = Ember.Route; var
filename = ‘photo.jpg’.split(‘.')[0]; var ext = ‘photo.jpg’.split('.')[1]; export default Route.extend(); Destructuring
import Ember from 'ember'; var { Route: Route }
= Ember; var [filename, ext] = 'photo.jpg'.split('.'); export default Route.extend(); Destructuring
import Ember from 'ember'; var { Route } =
Ember; var [filename, ext] = 'photo.jpg'.split('.'); export default Route.extend(); Destructuring
Template Strings
confirm('Really delete ' + promotion.name + '?'); Template Strings
confirm(`Really delete ${promotion.name}?`); Template Strings
const code = '<script src="' + src + '">\n' +
'</script>\n' + '<noscript>\n' + '<a href="' + link + '">View</a>\n' + '</noscript>'; Template Strings
const code = `<script src="${src}"> </script> <noscript> <a href="${link}">View</a> </noscript>`;
Template Strings
const and let
function example(isGood) { if (isGood) { var x = 4;
console.log(x); // 4 } console.log(x); // 4 } const and let
function example(isGood) { if (isGood) { const x = 4;
console.log(x); // 4 } console.log(x); // undefined } const and let
function canTransition(isSaving) { const canTransition = true; if (isSaving) {
canTransition = false; // Error: already set. } return canTransition; } const and let
function canTransition(isSaving) { let canTransition = true; if (isSaving) {
canTransition = false; } return canTransition; } const and let
Promises
Promise States Pending Fulfilled Rejected } Settled
getJSON onFulfilled onRejected getJSON onFulfilled onRejected
$.ajax(config) .then(onFulfilled, onRejected) Lies, all LIES!
var promise = getJSON('/comments'); somethingElse(); promise.then(onFulfilled, onRejected); Promise.prototype.then
JavaScript Promises Thinking Sync in an Async World then
JS