Combine multiple JavaScript files into one JS file

On linux you can use simple shell script https://github.com/dfsq/compressJS.sh to combine multiple javascript files into the single one. It makes use of the Closure Compiler online service so the resulting script is also effectively compressed.

$ ./compressJS.sh some-script.js another-sctipt.js onemore.js

You can do this via

• a. Manually: copy of all the Javascript files into one, run a compressor on it (optional but recommended) and upload to the server and link to that file.
• b. Use PHP: Just create an array of all JS files and include them all and output into a <script> tag

Try the google closure compiler:

http://code.google.com/closure/compiler/docs/gettingstarted_ui.html

Just combine the text files and then use something like the YUI Compressor.

Files can be easily combined using the command cat *.js > main.js and main.js can then be run through the YUI compressor using java -jar yuicompressor-x.y.z.jar -o main.min.js main.js.

Update Aug 2014

I've now migrated to using Gulp for javascript concatenation and compression as with various plugins and some minimal configuration you can do things like set up dependencies, compile coffeescript etc as well as compressing your JS.