Futuro do Subjuntivo - Quando vós programardes JavaScript

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Futuro do Subjuntivo Quando vós programardes JavaScript

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Jaydson Gomes @jaydson

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https://twitter.com/julian_duque/status/633450471643041792

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https://twitter.com/codepo8/status/638670886745321472

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Front-end Developer Tools

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JavaScript é Foda

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“You don’t break the web, you don’t get to clean the slate and start over. Anybody who tries is going to fail” Brendan Eich

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String .contains( )

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Criar uma library para tratar requisições.

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Request( )

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Xrequest( )

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68% 71% 63% 71% 53% 21% ES6 support

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let/const, tpl strings, new methods Modules, classes, arrow functions promises, symbols, iterators, generators, Async Functions junior x pleno x senior x ES6/ES7 developer x features

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Block Scope

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Template Strings

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String .repeat ( n )

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String .Includes ( txt, start )

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String .startsWith ( txt, start )

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Math.acosh(x) Math.asinh(x) Math.atanh(x) Math.cbrt(x) Math.clz32(x) Math.cosh(x) Math.expm1(x) Math.fround(x) Math.log1p(x) Math.log10(x) Math.log2(x) Math.sign(x) Math.sinh(x) Math.tanh(x) Math.trunc(x) Math.hypot(...values) Math.imul(x, y)

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Arrow => Functions

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Arrow Function: Single parameter

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arrow function: n parameters

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arrow function: parameterless

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arrow function: with a body

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Classical this issue

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Fixing this issue ES5

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Fixing this issue ES6

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Classes

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Modules

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Creating modules // baz.js let baz = 'baz'; export default baz; // app.js import baz from “baz”;

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Creating modules // foo.js import baz from "./baz"; console.log('From module baz >>> ', baz); let foo = 'foo'; export default foo; export let bar = 'bar'; // foo.js import { bar } from “foo”;

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Es7 Async functions

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Old friend Ajax

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Not so new friend, Promises

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Fetch API

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Parallel execution

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New powerful friend, generators

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The new awesome beast, async functions

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Parallel operations with async:

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Parallel operations with async + fetch (Oh my god this is great!):

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https://github.com/jaydson/es7-async

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Node.js 4.0 https://nodejs.org/en/blog/release/v4.0.0/

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V8 v4.5

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let const Typed array Collections Classes Generators Binary/ Octal Promises String methods Symbol Template strings Arrow functions

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Node.js 4.0 in progress

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Node.js 4.0 in action

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Node.js 4.0 in action

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https://babeljs.io/

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http://www.slideshare.net/cheilmann/can- we-make-es6-the-baseline-of-the-modern- web-braziljs-2105