Is there any point of using “return !0” in javascript?

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It is always true, but it takes 2 bytes to download (!0 is 2 characters) instead of 4 bytes to download the boolean value true.

Most Javascript minifiers will convert true to !0 and false to !1. You can see an example of this by typing var y = true; with Simple optimizations on Google’s Closure Compiler: http://closure-compiler.appspot.com/home

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