Kindy Lin kindy

ES7 Class Properties

**~~ NOTE: This is a Stage 0 proposal. ~~**

This proposal has been moved to https://github.com/jeffmo/es-class-properties.

Please direct all future feedback to that repo in the form of directed issues.

The introduction to Reactive Programming you've been missing

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

CSS Layout Debugger

A tweet-sized debugger for visualizing your CSS layouts. Outlines every DOM element on your page a random (valid) CSS hex color.

One-line version to paste in your DevTools

Use $$ if your browser aliases it:

~ 108 byte version

This is no longer needed as Emmet supports JSX - you just need to turn it all on. Did a quick tutorial: http://wesbos.com/emmet-react-jsx-sublime/

Thanks, @wesbos

Problem

Using emmet in jsx files
Emmet expands text when js autocomplete needed

The Ultimate Unit Testing Cheat-sheet

Sinon Chai
Chai
Sinon

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

Below is the list of modern JS frameworks and almost frameworks – React, Vue, Angular, Ember and others.

All files were downloaded from https://cdnjs.com and named accordingly. Output from ls command is stripped out (irrelevant stuff)

As-is (minified)

$ ls -lhS
566K Jan 4 22:03 angular2.min.js

Zone Motivation

Make writing asynchronous code easier by having a consistent way of propagating "context" across related asynchronous operations. Have the "context" be responsible for async-local-storage, allowing the execution before and after hooks, and "context"-local error handling. Finally make sure that the "context"s are composable.

This feature needs to be part of the platform so that library and framework authors can relay on a common well know API, otherwise adoption will be limited.

	#!/usr/bin/env bash
	pushd $(dirname $0) > /dev/null; CURRABSPATH=$(readlink -nf "$(pwd)"); popd > /dev/null; # Get the directory in which the script resides
	set -x
	MUSLPKG="musl:musl.tgz:http://www.musl-libc.org/releases/musl-1.1.4.tar.gz"
	LEVTPKG="libevent:libevent2.tgz:https://cloud.github.com/downloads/libevent/libevent/libevent-2.0.21-stable.tar.gz"
	TMUXPKG="tmux:tmux.tgz:http://iweb.dl.sourceforge.net/project/tmux/tmux/tmux-1.9/tmux-1.9a.tar.gz"
	NCRSPKG="ncurses:ncurses.tgz:http://ftp.gnu.org/pub/gnu/ncurses/ncurses-5.9.tar.gz"
	TEMPDIR="$CURRABSPATH/tmp"
	TMPLIB="tempinstall/lib"
	TMPINC="tempinstall/include"

	#!/usr/bin/perl -w

	# $Header: /CVSROOT/yahoo/ops/software/hwconfig/hwconfig,v 1.51.2.1 2008/11/06 01:01:10 filo Exp $

	use strict 'vars';
	use Getopt::Std;
	use POSIX;

	# constants
	$ENV{PATH} = "/etc/bin:/sbin:/usr/sbin:/bin:/usr/bin:/home/y/bin:/usr/local/bin:/usr/local/sbin:/home/opt:/opt/MegaRAID/MegaCli:/usr/StorMan";