Björn Lindner Bjoelin

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

This config shows an example of TYPO3 RealURL configuration, to map languages to domains.

Lets say the default language (L=0) is german and the foreign language is english (L=1). Normally RealURL would create links like that:

This example is about getting rid of the /en path segment.

Script for clearing all TYPO3 caches

This script aims to clear all (yes. really all) caches being used by TYPO3. So the file caches in typo3temp and typo3conf/autoload, next the database caches in tables cf_* and eventual realurl caches. And finally any PHP caches like those from APC, xcache, or other PHP accelerators/compilers.

Simply install the script at some executable location on your webserver

	$GLOBALS['TYPO3_CONF_VARS']['FE']['pageNotFound_handling'] = 'USER_FUNCTION:EXT:usermytemplate/Classes/Utility/PageNotFoundHandling.php:user_pageNotFound->pageNotFound';

	// Custom configuration for multi-language 404 page, see EXT:usermytemplate/Classes/Utility/PageNotFoundHandling.php
	// ID of the page to redirect to if page was not found
	$GLOBALS['TYPO3_CONF_VARS']['FE']['pageNotFound_handling_redirectPageID'] = 123;
	// ID of the page to redirect to if current page is access protected
	$GLOBALS['TYPO3_CONF_VARS']['FE']['pageNotFound_handling_loginPageID'] = 789;

	<?php

	namespace Your\Extension\Namespace\Hooks;

	class PageLayoutView implements \TYPO3\CMS\Backend\View\PageLayoutViewDrawItemHookInterface
	{

	/**
	* Preprocesses the preview rendering of a content element.
	*

	User-agent: *

	# Only allow URLs generated with RealURL
	Disallow: /?id=
	Disallow: /&id=

	# L=0 is the default language
	Disallow: /?L=0
	Disallow: /&L=0

	<?php

	class foo {

	/**
	* keep trac if we have created a custom error.
	* @var boolean
	*/
	protected $hasCustomError = false;

	<?php

	/**
	* Custom Doktypes
	*/
	// Define a new doktype
	$customShortlinkDoktype = 120;
	$customPageIcon = \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::extRelPath($_EXTKEY) . 'Resources/Public/Icons/Shortlink.png';
	// Add the new doktype to the list of page types
	$GLOBALS['PAGES_TYPES'][$customShortlinkDoktype] = array(

	<?php

	namespace Websight\MyExt\Validation;

	/***************************************************************
	* Copyright notice
	*
	* (c) 2015 Cedric Ziel <[email protected]>
	* (c) 2014 Carsten Bleicker <[email protected]>
	* All rights reserved

	<?php

	use TYPO3\CMS\Core\Utility\GeneralUtility;

	if (\TYPO3\CMS\Core\Core\Bootstrap::getInstance()->getApplicationContext()->isDevelopment()) {
	/**
	* This override adds the possibility to use multitree subdomains without domain records (for SHARED_DB, vagrant, etc.)
	* You can override the mappings or undo the override by creating a config file inside conf.d
	*
	* The override PageRepository checks for $subdomain . exec('hostname -f')