Setting just the 'from' value sometimes fails; setting both 'from' and 'to' works, but the 'to' shouldn't be necessary.
jQuery 1.9.1, HTML, CSS, JavaScript
Wrapper div inherits height of float-left divs contained within.
Mootools 1.4.5 (compat), HTML, CSS, JavaScript
With JQuery UI 1.10.3, the resulting div after a resize is one pixel too small in both directions.
No-Library (pure JS), HTML, CSS, JavaScript
jQuery 1.7.2, HTML, CSS, JavaScript