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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>reveal.js - The HTML Presentation Framework</title>
<meta name="description" content="A framework for easily creating beautiful presentations using HTML">
<meta name="author" content="Hakim El Hattab">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<link rel="stylesheet" href="bower_components/reveal.js/css/reveal.min.css">
<link rel="stylesheet" href="bower_components/reveal.js/css/theme/serif.css" id="theme">
<!-- For syntax highlighting -->
<link rel="stylesheet" href="bower_components/reveal.js/lib/css/zenburn.css">
<!-- If the query includes 'print-pdf', include the PDF print sheet -->
<script>
if( window.location.search.match( /print-pdf/gi ) ) {
var link = document.createElement( 'link' );
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = 'css/print/pdf.css';
document.getElementsByTagName( 'head' )[0].appendChild( link );
}
</script>
<!--[if lt IE 9]>
<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<section>
<h1>ES6</h1>
<h3>making javascript things easier</h3>
<p>Eric Ponto | @ericponto</p>
</section>
<section>
<section>
<h2>Variables</h2>
<pre><code>
var x = 10; // good ol' var
let y = 10; // block scoped
const MY_NUMBER = 10; // can't change it
</code></pre>
</section>
<section>
<h2>let</h2>
<pre><code>
function test() {
var x = 10;
if (true) {
let x = 15;
}
console.log(x); // 10
}
for (let i = 0; i < 100; i++) {}
console.log(i); // undefined
</code></pre>
</section>
<section>
<h2>const</h2>
<pre><code>
const x = 100;
x = 5; // error
</code></pre>
</section>
</section>
<section>
<section>
<h2>Desctructing Assignment</h2>
<pre><code>
var stuff = [10, 20];
var [x, y] = stuff;
console.log(x); // 10
console.log(y); // 20
</code></pre>
</section>
<section>
<h2>Swapping Vars</h2>
<div class="fragment">
<p>The old way</p>
<pre><code>
var temp = x;
x = y;
y = temp;
</code></pre>
</div>
<div class="fragment">
<p>The new way</p>
<pre><code>
[x, y] = [y, x];
</code></pre>
</div>
</section>
<section>
<h2>Objects</h2>
<pre><code>
var a = 5;
var b = 6;
var c = {a, b};
console.log(c.a); // 5
console.log(c.b); // 6
var {x, y} = {x: 10, y: 20};
console.log(x); // 10
console.log(y); // 20
</code></pre>
</section>
</section>
<section>
<section>
<h2>Spread Opperator</h2>
<pre><code>
var x = [2, 3, 4];
var y = [1, ...x, 5] // [1, 2, 3, 4, 5]
var z = [1];
z.push(...x); // [1, 2, 3, 4]
</code></pre>
</section>
<section>
<h2>Bye Bye apply</h2>
<pre><code>
var fn = function(a, b, c) {};
var x = [1, 2, 3];
// old way
fn.apply(null, x);
// new way
fn(...x);
</code></pre>
</section>
</section>
<section>
<section>
<h2>Paraments, Better arguements</h2>
<pre><code>
function fn() {
Array.isArray(arguements); // false
}
function fn(...args) {
Array.isArray(args); // true
}
function fn(a, b, ...others) {
// don't need to try to slice arguements any more
}
</code></pre>
</section>
<section>
<h2>Parameter Defaults</h2>
<div class="fragment">
<p>The old way</p>
<pre><code>
function myFunction(a, b, c) {
a = a || "default";
b = b || "bye";
c = c || "c";
}
</code></pre>
</div>
<div class="fragment">
<p>The new way</p>
<pre><code>
function myFunction(a="default", b="bye", c="c") {
}
</code></pre>
</div>
</section>
</section>
<section>
<section>
<h2>Array-like to Array</h2>
<div class="fragment">
<p>The old way</p>
<pre><code>
var divs = document.querySelectorAll("div");
divs.forEach(/*...*/) // error
[].forEach.call(divs, function(){});
</code></pre>
</div>
<div class="fragment">
<p>The new way</p>
<pre><code>
var divs = document.querySelectorAll("div");
Array.from(divs).forEach(function() {});
</code></pre>
</div>
</section>
<section>
<h2>Better for loops</h2>
<h3>for...of</h3>
<pre><code>
var x = ["a", "b", "c"];
for (let n of x) {
console.log(n);
} // "a", "b", "c"
</code></pre>
</section>
</section>
<section>
<h2>Merging/extending objects</h2>
<pre><code>
var x = {a: 1};
var y = {b: 2};
var o = Object.assign(x, y); // {a: 1, b: 2}
</code></pre>
</section>
<section>
<section>
<h2>Arrow Function</h2>
<div class="fragment">
<p>The old way</p>
<pre><code>
var add = function(x, y) {
return x + y
}
</code></pre>
</div>
<div class="fragment">
<p>The new way</p>
<pre><code>
var add = (x, y) => x + y;
</code></pre>
</div>
</section>
<section>
<h2>Scope</h2>
<pre><code>
function Thing() {
this.things = [1, 2, 3];
/*this.squaredThings = this.things.map(function(x) {
return this.square(x);
}.bind(this));*/
this.squaredThings = this.things.map(x=>this.square(x)); // [1, 4, 9]
}
Thing.prototype.square = function(n) {
return n * n;
}
</code></pre>
</section>
</section>
<section>
<section>
<h2>Strings - the back tick</h2>
<h3>Multiline and templating</h3>
<pre><code>
var myString = `this is a
multiline string
that just works`;
// basic templating
var name = "Eric";
var greeting = `Hello, ${name}`;
var x = 2;
var y = `There is ${x * 10} of those`;
</code></pre>
</section>
<section>
<h2>Contains</h2>
<div class="fragment">
<p>The old way</p>
<pre><code>
"hello".indexOf("lo") > -1; // true
</code></pre>
</div>
<div class="fragment">
<p>The new way</p>
<pre><code>
"hello".contains("lo"); // true
</code></pre>
</div>
</section>
</section>
<section>
<section>
<h2>Classes!</h2>
<pre><code>
class AwesomeThing {
constructor(a) {
this.a = a;
}
method1() {}
method2() {}
}
</code></pre>
</section>
<section>
<h2>Inheritance</h2>
<div class="fragment">
<p>The old way</p>
<pre><code>
var Dog = function() {
Animal.call(this);
};
Dog.prototype = Object.create(Animal.prototype);
Dog.prototype.constuctor = Dog;
</code></pre>
</div>
<div class="fragment">
<p>The new way</p>
<pre><code>
class Dog extends Animal {
constuctor() {
super();
}
}
</code></pre>
</div>
</section>
</section>
<section>
<h2>Other Stuff</h2>
<ul>
<li>Iterators/Generators</li>
<li>Promises</li>
<li>Math stuff</li>
<li>new types: Map, Set</li>
</ul>
</section>
<section>
<h2>Using ES6 today</h2>
<ul>
<li>Tracuer</li>
<li>6to5</li>
<li>EJS</li>
</ul>
</section>
<section>
<h2>Resources</h2>
<ul>
<li><a href="http://kangax.github.io/compat-table/es6/">Kangax compatibility tables</a></li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/New_in_JavaScript/ECMAScript_6_support_in_Mozilla">MDN ES6 support in FF</a></li>
</ul>
</section>
</div>
</div>
<script src="bower_components/reveal.js/lib/js/head.min.js"></script>
<script src="bower_components/reveal.js/js/reveal.min.js"></script>
<script>
// Full list of configuration options available here:
// https://github.com/hakimel/reveal.js#configuration
Reveal.initialize({
controls: true,
progress: true,
history: true,
center: true,
theme: Reveal.getQueryHash().theme, // available themes are in /css/theme
transition: Reveal.getQueryHash().transition || 'default', // default/cube/page/concave/zoom/linear/fade/none
// Parallax scrolling
// parallaxBackgroundImage: 'https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg',
// parallaxBackgroundSize: '2100px 900px',
// Optional libraries used to extend on reveal.js
dependencies: [
{ src: 'bower_components/reveal.js/lib/js/classList.js', condition: function() { return !document.body.classList; } },
{ src: 'bower_components/reveal.js/plugin/markdown/marked.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
{ src: 'bower_components/reveal.js/plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
{ src: 'bower_components/reveal.js/plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
{ src: 'bower_components/reveal.js/plugin/zoom-js/zoom.js', async: true, condition: function() { return !!document.body.classList; } },
{ src: 'bower_components/reveal.js/plugin/notes/notes.js', async: true, condition: function() { return !!document.body.classList; } }
]
});
</script>
</body>
</html>