ryanflorence

var http = require("http"),
    url = require("url"),
    path = require("path"),
    fs = require("fs")
    port = process.argv[2] || 8888;

http.createServer(function(request, response) {

  var uri = url.parse(request.url).pathname
    , filename = path.join(process.cwd(), uri);

matthewcrist

<img width="500" height="335" title="" alt="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAfQAAAFPCAIAAAA0uatrAAA4ZElEQVR42u2d919TW9aH5++aO6YSEnrvqAgCAiIiWLCigiJ2EVBAAbGLV7BgRzqKihQBUXpNIYE0Zub96V05x8twlRIgQHLyzef53GGQkpwcnr322muv/Y/JySkAAAAc4x+4BAAAALkDAACA3AEAAEDuAAAAIHcAAACQOwAAQO4AAAAgdwAAAJA7AAAAyB0AAADkDgAAkDuuAgAAQO4AAAAgdwAAAJA7AAAAyB0AAADkDgAAkDsAAADIHQAAAOQOAAAAcgcAAAC5AwAA5I6rAAAAkDsAAADIHQAAAOQOAAAAcgcAAAC5AwAA5A4AAAByBwAAALkDAACA3AEAAEDuAAAAuQMAAIDcAQAAQO4AAAAgdwAAAJA7AAAAyB0AACB3AAAAkDsAAADIHQAAAOQOAAAAcgcAAMgdAAAA5A4AAAByBwAAALkDAACA3AEAAEDuAAAAuQMAAIDcAQAAQO4AAAAgdwAAAJA7AABA7gAAACB3AAAAkDsAAADIHQAAAOQOAAAAcgcAAMgdAAAA5A4AAAByBwAAALkDAACA3AEAAHIHAAAAuQMAAIDcAQAAQO4AAAAgdwAAAJA7AABA7gAAACB3AAAAkDsAAADIHQAAAOQOAACQOwAAAMgdAAAA5A4AAAByBwAAALkDAACA3AEAAHIHAAAAuQMAAIDcAQAAQO4AAAAgdwAAgNwBAABA7gAAACB3AAAAkDsAAADIHQAAAOQOAACQOwAAAMgdAAAA5A4AAAByBwAAALkDAADkDgAAAHIHAAAAuQMAAIDcAQAAQO4AAAAgdwAAgNwBAABA7gAAACB3AAAAkDsAAADIHQCwUqamtOaDywW5AwBsgIkJ9fi4fFwuVypVC6NSTajVGu2U1mAw6vVGiB5yBwAsJ5rWanU6nUF

petehunt

/** @jsx React.DOM */
var MyRootComponent = React.createClass({
  getInitialState: function() {
    return {perMinute: '-', perDay: '-'};
  },
  componentDidMount: function() {
    var socket = io.connect(this.props.url);
    socket.on('business.clickout', this.setState.bind(this));
  },
  render: function() {

bendc

// array utils
// =================================================================================================

const combine = (...arrays) => [].concat(...arrays);

const compact = arr => arr.filter(Boolean);

const contains = (() => Array.prototype.includes
  ? (arr, value) => arr.includes(value)
  : (arr, value) => arr.some(el => el === value)

bendc

var elements = document.querySelectorAll("div"),
    callback = (el) => { console.log(el); };

// Spread operator
[...elements].forEach(callback);

// Array.from()
Array.from(elements).forEach(callback);

// for...of statement

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

ayamflow

// Add on element with overflow
-webkit-mask-image: -webkit-radial-gradient(white, black);

DaBs

var str = 'class ಠ_ಠ extends Array {constructor(j = "a", ...c) {const q = (({u: e}) => {return { [`s${c}`]: Symbol(j) };})({});super(j, q, ...c);}}' + 
          'new Promise((f) => {const a = function* (){return "\u{20BB7}".match(/./u)[0].length === 2 || true;};for (let vre of a()) {' +
          'const [uw, as, he, re] = [new Set(), new WeakSet(), new Map(), new WeakMap()];break;}f(new Proxy({}, {get: (han, h) => h in han ? han[h] ' + 
          ': "42".repeat(0o10)}));}).then(bi => new ಠ_ಠ(bi.rd));';

try {
  eval(str);
} catch(e) {
  alert('Your browser does not support ES6!')
}

davidgilbertson

const price = 1234.567;

const formattedPrice = price.toLocaleString('en', {
  style: 'currency',
  currency: 'USD'
});

console.log(formattedPrice); // "$1,234.57"

JamieMason

ES6 JavaScript Compose Function

Definition

const compose = (...fns) =>
  fns.reduceRight((prevFn, nextFn) =>
    (...args) => nextFn(prevFn(...args)),
    value => value
 );