I’m tossing an early-morning project out there for anyone who might find it useful. It was inspired by a quick tip via OneThingWell. It lets you pop up LaunchBar, type in a Sparkup format string and create a temporary playground (with jQuery loaded) in Chrome. You can then use the inspector to modify elements and test out jQuery.
This is a companion discussion topic for the original entry at https://brettterpstra.com/2013/01/31/jquery-fiddler-for-launchbar