Finding Problems in Your JavaScript Code

• Chrome's Developers Tool (Console) (More tools → Developer tools → Console)
• JS Closure Compiler (JS Closure Compiler)
• JS Hint (http://www.jshint.com/)
• Chrome Debugger - https://developer.chrome.com/docs/devtools/javascript/
• Firefox Debugger
  • Open script you want to debug with Firefox
  • You will find the debugger at Tools → Web Developer → Debugger
  • To set a breakpoint click on the line number (right-click on a line number for additional options)
  • Reload page to run script
  • Typical stop, set over and step into option can be found on stop of “Sources” and “Call Stack” tabs
  • Call Stack – allows you to change stack frame
• Add error handler as described in Debugging With Error Handler