what's the difference between jquery.js and jquery.min.js

Question

what is the difference between jquery.min.js and jquery.js

which on support for all functions

Answer 1

Both support the same functions. jquery.min.js is a compressed version of jquery.js (whitespaces and comments stripped out, shorter variable names, ...) in order to preserve bandwidth. In terms of functionality they are absolutely the same. It is recommended to use this compressed version in production environment.

Answer 2

Both contain the same functionality but the .min.js equivalent has been optimized in size. You can open both files and take a look at them. In the .min.js file you'll notice that all variables names have been reduced to short names and that most whitespace & comments have been taken out.

Answer 3

• jquery.js = pretty and easy to read :) read this one.
• jquery.min.js = looks like jibberish! but smaller file size. put this one on your site.

Answer 4

Jquery.min.js is nothing else but compressed version of jquery.js. You can use it the same way as jquery.js, but it's smaller, so in production you should use minified version and when you're debugging you can use normal jquery.js version. If you want to compress your own javascript file you can these compressors:

• http://developer.yahoo.com/yui/compressor/
• http://code.google.com/intl/pl-PL/closure/compiler/

Or just read topis on StackOverflow about js compression :) :

• http://stackoverflow.com/questions/28932/best-javascript-compressor
• http://stackoverflow.com/questions/599911/what-do-you-use-to-minimize-and-compress-javascript-libraries
• List item

Answer 5

jquery.js: when you have to dive into jquery's source code jquery.min.js: compressed version for saving bandwidth

There is one more option for saving more bandwidth then the compressed version which is using something like Google CDN provided: http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js

Answer 6

jquery.min is compress version. It's removed comments, new lines, ...

Answer 7

Just to point out as well, you are better using the minified version (.min) for your live environment as Google are now checking on page loading times. Having all your JS file minified means they will load faster and will score you more brownie points.

You can get an addon for Mozilla called Page Speed that will look through your site and show you all the .JS files and provide minified versions (amongst other things).