Cody Olsen stipsan

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

Essential JavaScript Links

I no longer mantain this list. There are lots of other very comprehensive JavaScript link lists out there. Please see those, instead (Google "awesome JavaScript" for a start).

Default

Powerlevel10k

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

	let AnimationWrapper = React.createClass({
	render() {
	console.log(this.props.childClassName + ' render');

	return this.props.children;
	},

	componentWillAppear (callback) {
	console.log(this.props.childClassName + ' willappear');
	callback();

	When pod install or pod update gets hanged at "Analyzing dependencies", please consider to reinstall cocoapods.

	#Uninstallation. Reference: http://superuser.com/questions/686317/how-to-fully-uninstall-the-cocoapods-from-the-mac-machine
	$gem list --local \| grep cocoapods

	#The list will show like this
	cocoapods (0.27.1, 0.20.2)
	cocoapods-core (0.27.1, 0.20.2)
	cocoapods-downloader (0.2.0, 0.1.2)