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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>ES6 Modules</title>
<meta name="description" content="ES6 Modules">
<meta name="author" content="Alex Jegtnes">
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</head>
<body>
<div class="shameless-self-promotion">
<a href="https://twitter.com/jegtnes">@jegtnes</a>
<p>BristolJS—27 Jan 2015</p>
</div>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<section>
<h1 style="font-size: 300%;">ES6 Modules</h1>
<h2 style="font-size: 125%">vs Node/CommonJS modules</h2>
</section>
<section>
<h1>So I tried keeping up</h1>
<h3>with these darned newfangled developments in the JabberScript world</h3>
</section>
<section>
<h2><a href="http://teropa.info/blog/2015/09/10/full-stack-redux-tutorial.html">Full-Stack Redux Tutorial</a></h2>
</section>
<section>
<h2>Things I've tried:</h2>
<ul>
<li>Node.js</li>
<li>Web sockets</li>
</ul>
</section>
<section>
<h2>Things I hadn't tried:</h2>
<ul>
<li>Redux</li>
<li>React</li>
<li>ES6</li>
<li>Babel</li>
<li>Webpack</li>
</ul>
</section>
<section>
<img src="http://i.imgur.com/ntPY750.jpg" alt="">
</section>
<section>
<p>To find out exactly how much I didn't know, I started writing about it</p>
<p>(<a href="http://tiljs.jegtnes.co.uk/">tiljs.jegtnes.co.uk</a>)</p>
</section>
<section>
<h1>Today:</h1>
<h2>WTF are ES6 modules</h2>
<h3>Why the hell are there braces in my import statements</h3>
<h3>what year is this</h3>
<h4>etc etc</h4>
</section>
<section>
<img src="http://i.kinja-img.com/gawker-media/image/upload/lm8puttvfr92sototprw.jpg" width=800 alt="">
</section>
<section>
<h1>Basic module usage</h1>
</section>
<section>
<h1>Node:</h1>
<h2>cocktail.js</h2>
<pre><code class="language-javascript">
function getCocktail() {
return "Sazerac";
}
module.exports = getCocktail;
</code></pre>
</section>
<section>
<h1>Node:</h1>
<h2>app.js</h2>
<pre><code class="language-javascript">
var getCocktail = require('./cocktail');
console.log(getCocktail()) // "Sazerac";
</code></pre>
</section>
<section>
<h1>ES6:</h1>
<h2>cocktail.js</h2>
<pre><code class="language-javascript">
function getCocktail() {
return "Sazerac";
}
export default getCocktail;
</code></pre>
</section>
<section>
<h1>ES6:</h1>
<h2>app.js</h2>
<pre><code class="language-javascript">
import 'getCocktail' from './cocktail'
console.log(getCocktail()); // "Sazerac";
</code></pre>
</section>
<section>
<h1>Exporting several things</h1>
</section>
<section>
<h1>Node:</h1>
<h2>cocktail.js</h2>
<pre><code class="language-javascript">
function getWhiskyCocktail() {
return "Sazerac";
}
function getGinCocktail() {
return "Martini"; // stirred, obviously
}
function getVirginCocktail() {
return "Virgin Mary";
}
module.exports = {getGinCocktail, getVirginCocktail, getWhiskyCocktail};
</code></pre>
</section>
<section>
<h1>Node:</h1>
<h2>app.js</h2>
<pre><code class="language-javascript">
var cocktails = require('./cocktail');
console.log(cocktails.getGinCocktail()); // Martini
console.log(cocktails.getVirginCocktail()); // Virgin Mary
</code></pre>
</section>
<section>
<h1>ES6:</h1>
<h2>cocktail.js</h2>
<pre><code class="language-javascript">
function getWhiskyCocktail() {
return "Sazerac";
}
function getGinCocktail() {
return "Martini"; // stirred, obviously
}
function getVirginCocktail() {
return "Virgin Mary";
}
export {getGinCocktail, getVirginCocktail, getWhiskyCocktail};
</code></pre>
</section>
<section>
<h1>ES6:</h1>
<h2>app.js</h2>
<pre><code class="language-javascript">
import {getGinCocktail, getVirginCocktail} from './cocktail';
console.log(getGinCocktail()); // Martini
console.log(getVirginCocktail()); // Virgin Mary
</code></pre>
</section>
<section>
<h1>ES6:</h1>
<h2>app.js</h2>
<pre><code class="language-javascript">
import 'getCocktail' from './cocktail'
console.log(getCocktail()); // "Sazerac";
</code></pre>
</section>
<section>
<h1>ES6 default exports</h1>
<h2>aka why the hell there are braces in your import statments</h2>
</section>
<section>
<pre><code class="language-javascript">
export default thing; // vs
export {thing2, otherThing};
</code></pre>
</section>
<section>
<h1>ES6:</h1>
<h2>cocktails.js</h2>
<pre><code class="language-javascript">
//snip
export default getWhiskyCocktail;
export {getGinCocktail, getVirginCocktail};
</code></pre>
</section>
<section>
<h1>ES6:</h1>
<h2>app.js</h2>
<pre><code class="language-javascript">
import getWhiskyCocktail from './cocktail';
console.log(getWhiskyCocktail()); // Sazerac
</code></pre>
</section>
<section>
<h1>ES6:</h1>
<h2>app.js</h2>
<pre><code class="language-javascript">
import getWhiskyCocktail, {getVirginCocktail} from './cocktail';
console.log(getWhiskyCocktail()); // Sazerac
console.log(getVirginCocktail()); // Virgin Mary
</code></pre>
</section>
<section>
<pre><code class="language-javascript">
export {getGinCocktail, getVirginCocktail, getWhiskyCocktail};
</code></pre>
<pre><code class="language-javascript">
import getWhiskyCocktail from './cocktail';
console.log(getWhiskyCocktail()); // error!
</code></pre>
</section>
<section>
<h1>Mildly fascinating</h1>
<h2>You can rename imports in ES6</h2>
<pre><code class="language-javascript">
import {getWhiskyCocktail as getCocktail} from './cocktail';
console.log(getCocktail()); // Sazerac
</code></pre>
</section>
<section>
<h1>Useful resources:</h1>
<ul>
<li><a href="https://developer.mozilla.org/en/docs/web/javascript/reference/statements/import">MDN article on import</a></li>
<li><a href="https://developer.mozilla.org/en/docs/web/javascript/reference/statements/export">MDN article on export</a></li>
<li><a href="http://exploringjs.com/es6/ch_modules.html#ch_modules">ExploringJS article on ES6 modules</a></li>
</ul>
</section>
<section>
<h1>Cheers, folks! ❤️ 🎉✨</h1>
<ul>
<li><a href="http://static.jegtnes.co.uk/talks/2016-01-bristoljs">These slides</a></li>
<li><a href="http://github.com/jegtnes/es6-modules-lightning-talk">These slides (on GitHub)</a></li>
<li><a href="http://tiljs.jegtnes.co.uk/es6-module-syntax/">Original TILJS blog posts</a></li>
</ul>
</section>
</div>
</div>
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