garybernhardt

This document has moved!

It's now here, in The Programmer's Compendium. The content is the same as before, but being part of the compendium means that it's actively maintained.

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

romainl

Vim: available key pairs in normal mode

All lowercase

The operators c, d, and y expect a motion, like w, e, etc. The second character in the following pairs is not a motion so it is a NOP and nothing is overridden if we use them in mappings.

cd cm co cp cq cr cs cu cx cy cz

dc dm dq dr ds du dx dy dz