Tim Routowicz troutowicz

Ever wonder why a particular website is showing a development build icon for React DevTools? Here's how you can find out!

First copy/paste this well-annotated DevTools build-type-checker function into your browser console so you can run it.

Next, execute the following line in your developer console:

console.log(__REACT_DEVTOOLS_GLOBAL_HOOK__._renderers);

If React is present on the page, you'll see something like:

What I Wish I'd Known About Equity Before Joining A Unicorn

Disclaimer: This piece is written anonymously. The names of a few particular companies are mentioned, but as common examples only.

This is a short write-up on things that I wish I'd known and considered before joining a private company (aka startup, aka unicorn in some cases). I'm not trying to make the case that you should never join a private company, but the power imbalance between founder and employee is extreme, and that potential candidates would

Recently CSS has got a lot of negativity. But I would like to defend it and show, that with good naming convention CSS works pretty well.

My 3 developers team has just developed React.js application with 7668 lines of CSS (and just 2 !important). During one year of development we had 0 issues with CSS. No refactoring typos, no style leaks, no performance problems, possibly, it is the most stable part of our application.

Here are main principles we use to write CSS for modern (IE11+) browsers:

SUIT CSS naming conventions + SUIT CSS design principles;
PostCSS + CSSNext. Future CSS syntax like variables, nesting, and autoprefixer are good enough;
Flexbox is awesome. No need for grid framework;
Normalize.css, base styles and variables are solid foundation for all components;

ttf

curl 'https://fonts.googleapis.com/css?family=Karla'

woff2

curl 'https://fonts.googleapis.com/css?family=Karla' -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8' -H 'User-Agent: AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116'

	// Y Combinator
	const Y = a => (b => b (b)) (b => a (c => b (b) (c)))

	// isomorphic Church encoding/decoding
	const Church = {
	to: n => f => x => Array.from (Array (n)).reduce (f, x),
	from: f => f (x => x + 1) (0)
	}

	const True = a => b => a

	"use strict";

	[foo,bar] = TNG(foo,bar);
	// NOTE: intentionally not TNG(..) wrapping useBaz(), so that it's
	// basically like a "custom hook" that can be called only from other
	// TNG-wrapped functions

	function foo(origX,origY) {
	var [x,setX] = useState(origX);
	var [y,setY] = useState(origY);

	/******************************************************************************/
	'use strict';
	/******************************************************************************/
	// via https://twitter.com/bmeurer/status/821804688454680576

	console.log(`
	// v8 ${process.versions.v8} (Node.js ${process.versions.node})
	`);

	function f1(a) {

	/*<?php
	///public class PhpJava { public static void main(String[] args) { System.out.printf("/%s",
	//\u000A\u002F\u002A
	class PhpJava {
	static function main() {
	echo(//\u000A\u002A\u002F
	"Hello World!");
	}}
	//\u000A\u002F\u002A
	PhpJava::main();

	import React, { Component, PropTypes } from 'react'
	import Toolbar from 'containers/Toolbar'
	import InlineMath, { forceUpdateEquation } from 'containers/InlineMath'
	import EquationEditor from 'components/EquationEditor'
	import { Editor, EditorState, ContentState, SelectionState, Entity, CompositeDecorator, Modifier, convertToRaw, RichUtils } from 'draft-js'

	const SUPPORTED_COMMANDS = [ 'italic' ]

	function findTex(contentBlock, callback) {
	contentBlock.findEntityRanges(

	'use strict';

	var model = require('prosemirror/model');
	var ProseMirror = require('prosemirror/edit').ProseMirror;
	var toDOM = require('prosemirror/convert/to_dom');
	var fromDOM = require('prosemirror/convert/from_dom');
	var elt = require('prosemirror/dom').elt;

	function inline(dom, context, added) {
	var old = context.styles;