What is a good Javascript debugging tool?

Question

Haven\'t touch javascript for 3 years. Just got a javascript project and wanted to know any new ways or tools emerged these years to debug javascript? I used alert 3 years

Answer 1

As others have pointed out, most javascript debugging tools come as part of a browser because they are tightly integrated with the Javascript engine itself. This is probably a good thing because you will want to debug each browser separately if you run into a browser-specific quirk.

In the Internet Explorer world, you have two options:

1. As Ryan Lynch pointed out, the Microsoft Script Debugger is a separate debugging environment that talks with IE. If you have Visual Studio Web Developer Edition, the tool should already be available to you. You can attach directly to IE from within VS.
2. Recommended: Use a debugger that runs in the browser. IE8 has Developer Tools built-in (press F12) or download the Web Development Helper for earlier versions. Both provide a good light-weight environment right inside IE. They also help to debug CSS layout and other aspects of a website.