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@paulirish
paulirish / what-forces-layout.md
Last active January 22, 2026 21:32
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
@afrendeiro
afrendeiro / flac+cue2mp3.sh
Created September 15, 2013 10:39
Command-line conversion of flac+cue files to mp3 split tracks
#!/bin/sh
# Flacon-style convert to mp3 and split tracks from flac+cue files
# Made by André Rendeiro (afrendeiro@gmail.com)
# Rename
{
find . -name '* *' | while read file; do target=`echo "$file" | sed 's/ /_/g'`; mv "$file" "$target"; done
find . -name '* *' | while read file; do target=`echo "$file" | sed 's/ /_/g'`; mv "$file" "$target"; done
find . -name '* *' | while read file; do target=`echo "$file" | sed 's/ /_/g'`; mv "$file" "$target"; done