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.
elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
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“I perfectly understand our CSS. I never have any issues with cascading rules. I never have to use !important or inline styles. Even though somebody else wrote this bit of CSS, I know exactly how it works and how to extend it. Fixes are easy! I have a hard time breaking our CSS. I know exactly where to put new CSS. We use all of our CSS and it’s pretty small overall. When I delete a template, I know the exact corresponding CSS file and I can delete it all at once. Nothing gets left behind.”
You often hear updog saying stuff like this. Who’s updog? Not much, who is up with you?
| #!/usr/bin/env perl | |
| # | |
| # http://daringfireball.net/2007/03/javascript_bookmarklet_builder | |
| use strict; | |
| use warnings; | |
| use URI::Escape qw(uri_escape_utf8); | |
| use open IO => ":utf8", # UTF8 by default | |
| ":std"; # Apply to STDIN/STDOUT/STDERR |
| #!/bin/bash | |
| # | |
| # transcode-video.sh | |
| # | |
| # Copyright (c) 2013-2015 Don Melton | |
| # | |
| about() { | |
| cat <<EOF | |
| $program 5.13 of April 8, 2015 |