can GNU license javascript be used on commercial websites with out cost?

Question by QuestionMaster: can GNU license javascript be used on commercial websites with out cost?
I am not sure when scripts from www.extjs.com or www.dhtmlx.com and other scripts that are license under GNU can be used on commercial websites, which have no plans to sell the website, just to use the scripts, in order to make their website look better.

My understanding of GNU license scripts is that they are free to use, and considering you can view source from a web browser, i guess any javascript license under the GNU is free for use ?

is this correct ?

Best answer:

Answer by Tizio 008
you should read carefully the GPL.
I do not know how it applies to javascript, when it is embedded in something considered commercial (even though its source is open by definition, nonetheless it could not be “free” in the “GNU” sense).
maybe for issues like this the LGPL is born… but again I do not know how this can be applied to the case you’re talking about.

the only thing you can do is to read carefully the GPL, or ask to fsf for legal issue like yours

~
GPL generally “means” “free for use”, but with some contraints. if you use it in “GPLicensed” projects, no problem. otherwise… you should check … i dont know.

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