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Steve Yeggae's js2-mode highlights globals during editing, and it's saved me a good many times. http://code.google.com/p/js2-mode/ http://code.google.com/p/js2

Steve Yeggae's js2-mode highlights globals during editing, and it's saved me a good many times. http://code.google.com/p/js2-mode/ http://code.google.com/p/js2-mode/ Mind you it won't catch globals declared in chained assignments eg var x = y = 0; // y is defined globally

webXL 15y ago
If you're looking for a new IDE, JetBrains WebStorm does this. In the chained assignment, as well.
thomblake 15y ago
The fork of js2-mode at https://github.com/mooz/js2-mode https://github.com/mooz/js2-mode will catch that, as will js3-mode.