javascript related debugging tools or libraries? [closed]

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When you debug javascript related issues, any tools or libraries you can use to debug more easily to find the root cause? Any tool on Windows/Linux/Mac and for IE/Firefo开发者_高级运维x are ok. I am just collecting a list of good tools so that I can use them to trouble shoot when I meet with any issues. :-)

thanks in advance, George

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Personally I like and use FireBug.

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What is a good Javascript debugging tool? here on SO

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1. Firebug (For Firefox and general JS debugging)
2. Developer Tools in IE8+ (comes built-in)
3. Web Inspector in WebKit like Chrome/Safari (comes built-in).

Other than that, you should be using Fiddler to keep track of performance/requests etc.

And finally JSFiddle.net for stand-alone testing.

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I use firebug most of the time with the following firebug plugins.

• Firebug

• FireRainbow, FireRainbow enables javascript syntax highlighting for Firebug. This is really cool. Saves a lot of time.

• FirePHP,FirePHP enables you to log to your Firebug Console using a simple PHP method call.

• Widerbug, can leverage wide screens for js debugging/development. Obsolete now as it is supported in Firebug 1.9 right out of the box.