removing whitespace and comments.
You can do this, but these tools can be finnicky and may make unwanted changes if your code isn’t formatted
properly. Here’s what you can do:
1. Run JSLint (online or downloadable version) to analyze your code and make sure it is well-formatted.
2. Use Rhino to compress your javascript. There are some online packers, but Rhino actually analyzes your source
code so it has a low chance of changing it as it compresses, and it is scriptable.
Install Rhino (it requires Java), then run it from the command-line:
java -jar custom_rhino.jar -c myfile.js > myfile.js.packed 2>&1
This compresses myfile.js and spits it out into myfile.js.packed. Rhino will remove spaces, comments and shorten
variable names where appropriate. The “2>&1″ part means “redirect standard error to the same location as the
output”, so you’ll see any error messages inside the packed file itself (cool, eh? Learn more here.).
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source:http://linuxpoison.blogspot.com/2009/03/13578175716344.html