There are lots of good resources out there for debugging JavaScript in the browser.  Here’s one:  http://www.pluralsight.com/courses/chrome-developer-tools.  

I would also recommend using http://jshint.com/ to see if your code has unused variables, or bad curly braces etc. You can also use alert(‘Hello World’) to see values and freeze execution.

Like any good craftsperson, the tools you use are a very personal choice. They must work with you and not get in your way. There are plenty of tools out there, but there are a few popular ones that seem to meet most people’s needs.

The Chrome Developer Tools built in to the Chrome browser are very popular and extremely powerful. You can read Google’s official documentation on those tools here: https://developer.chrome.com/devtools

Firefox has an entire browser dedicated to developers, with many of the same powerful tools available in Chrome plus a few additional features I’ve not seen elsewhere: https://www.mozilla.org/en-US/firefox/developer/

There are also tools available for helping you to write, analyze and process your javascript. Personally, I like using Sublime text editor (http://www.sublimetext.com/) with Package Control (https://sublime.wbond.net/), Grunt (https://sublime.wbond.net/packages/Grunt) and a few other select grunt plugins (like https://github.com/gruntjs/grunt-contrib-uglify).

However, Eclipse (http://www.eclipse.org/downloads/packages/eclipse-ide-java-developers/keplerr) is also a very popular option and integrates a little bit better with Salesforce (https://developer.salesforce.com/page/Force.com_IDE_Installation).

These are just a few of the tools available, however, and it’s good to try several different options to see which ones best fit your personality and style.

Brackets is another very nice editor http://brackets.io/.

Want a code playground? http://www.sitepoint.com/7-code-playgrounds/

Do any of these editors need anything in order to work with the Skuid APIs? ie. will the properties autofill/dropbox?

ST and Brackets support AutoCompletion.

Do I need to do anything in order to see autocompletion work for Skuid APIs?