Please note that this FAQ applies only to the old NetBeans 6.x. The new NetBeans versions do support JavaScript debugging directly and out-of-the-box. Especially starting with NetBeans 8.1 which supports JavaScript debugging of both front-end JS code via Chrome browser plugin and back-end JS code in Node.js environment.

What is JavaScript Debugger?

The NetBeans JavaScript debugger is a set of tools that aid in the process of inspecting, monitoring and editing client-side JavaScript code. You can use the debugger to identify errors, or step through execution and explore the state of your application at any given moment. Numerous debugging windows are also at your disposal, affording an intuitive interface to examine variable and expression values, threads, sessions, breakpoints and more. The NetBeans JavaScript debugger offers a common user experience for both Firefox and Internet Explorer. Debugger support for FireFox is based on Firebug, whereas for Internet Explorer it is based on the Active Scripting debugger framework.

What is the last version of NetBeans IDE that supports JavaScript Debugger?

NetBeans IDE 6.8 is the last version. NetBeans IDE 6.7 is the last recommended version.

How do I use the JavaScript Debugger?

A full set of instructions for using JavaScript Debugger are given in "JavaScript Debugger User's Guide." This is a NetBeans IDE 6.7 web tutorial. You can access this document from NetBeans IDE Docs for Previous Releases. The document is in the Web Applications category.

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