Timothée Barray tyx

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

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

	<?

	// Link image type to correct image loader and saver
	// - makes it easier to add additional types later on
	// - makes the function easier to read
	const IMAGE_HANDLERS = [
	IMAGETYPE_JPEG => [
	'load' => 'imagecreatefromjpeg',
	'save' => 'imagejpeg',
	'quality' => 100

	<?php

	/**
	* This is the clock interface. It's really simple, you write it once, use it anywhere.
	* Cool extra things you can do:
	* - have it return custom value objects
	* - separate method for currentDate() without time part
	*/
	interface Clock
	{

	Feature: Cookie Jar

	Scenario: The last cookie put in the jar is the first eaten
	Given I put a raisin cookie in the jar
	And I put a chocolate cookie in the jar
	When I eat a cookie
	Then I should have eaten a chocolate cookie

	Scenario: I eat multiple cookies
	Given I put a raisin cookie in the jar

	<?php

	require_once __DIR__ . '/vendor/autoload.php';

	$namespace = 'PutYourProjectNamespaceHere\\';

	foreach (new RegexIterator(new RecursiveIteratorIterator(new RecursiveDirectoryIterator(__DIR__ . '/src')), '/^.+\.php$/i', RecursiveRegexIterator::GET_MATCH) as $file) {
	require_once $file[0];
	}

	<?php
	/*
	* This example illustrates modelling the following use cases:
	*
	* - A user can write and publish an article, with the title, description.etc.
	* - X users can then respond to said article by posting comments,
	* - and responding to one another.
	* - it is very common for an Article to be 'locked' when it becomes older.
	*
	* Note: The example is an incomplete draft.

	<?php

	namespace AppBundle\Form;

	use AppBundle\Model\Username;
	use Symfony\Component\Form\AbstractType;
	use Symfony\Component\Form\DataMapperInterface;
	use Symfony\Component\Form\FormBuilderInterface;
	use Symfony\Component\Form\FormError;

	class MoneyType extends AbstractType implements DataMapperInterface
	{
	public function buildForm(FormBuilder $builder, array $options)
	{
	$builder
	->add('amount', 'integer')
	->add('currency', 'string')
	->setDataMapper($this)
	;
	}