Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

paulirish / what-forces-layout.md

Last active July 18, 2026 01:45

What forces layout/reflow. The comprehensive list.

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

recto / PythonVirtualenvMac.md

Last active November 9, 2021 09:41

Python 2 and 3 setup with virtualenv on Mac OS X

Python Installation

You can install the latest python 2 and python 3 by homebrew.

Python 2 Installation

brew install python

Python 3 Installation

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