paulirish

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

jfdm

/** \mainpage
 *
 * __NaCl__ (pronounced _salt_) is a new easy-to-use high-speed
 * software library for network communication, encryption, decryption,
 * signatures, etc. NaCl's goal is to provide all of the core
 * operations needed to build higher-level cryptographic tools.
 *
 * __Sodium__ is a portable, cross-compilable, installable,
 * packageable, API-compatible version of NaCl.
 *