Combine multiple JavaScript files into one JS file

Question

I am using jquery in my web application and I need to load more jquery script files into a single page   Google suggested I combine all the jquery script files into a single file   How can I do this

User · Answer

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  lt script gt  tag

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Try the google closure compiler   http   code google com closure compiler docs gettingstarted ui html

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I use this shell script on Linux https   github com eloone mergejs    Compared to the above scripts it has the advantages of being very simple to use  and a big plus is that you can list the js files you want to merge in an input text file and not in the command line  so your list is reusable and you don t have to type it every time you want to merge your files  It s very handy since you will repeat this step every time you want to push into production  You can also comment files you don t want to merge in the list  The command line you would most likely type is      mergejs js files list txt output js   And if you want to also compress the resulting merged file      mergejs -c js files list txt output js   This will create output-min js minified by Google s closure compiler  Or      mergejs -c js files list txt output js output minified js   If you want a specific name for your minified file named output minified js  I find it really helpful for a simple website

User · Answer

You can use the Closure-compiler as orangutancloud suggests  It s worth pointing out that you don t actually need to compile minify the JavaScript  it ought to be possible to simply concatenate the JavaScript text files into a single text file  Just join them in the order they re normally included in the page

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This may be a bit of effort but you could download my open-source wiki project from codeplex   http   shuttlewiki codeplex com  It contains a CompressJavascript project  and CompressCSS  that uses the http   yuicompressor codeplex com  project   The code should be self-explanatory but it makes combining and compressing the files a bit simnpler --- for me anyway     The ShuttleWiki project shows how to use it in the post-build event

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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

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You can use a script that I made  You need JRuby to run this though  https   bitbucket org ardee aram jscombiner  JSCombiner    What sets this apart is that it watches file changes in the javascript  and combines it automatically to the script of your choice  So there is no need to manually  build  your javascript each time you test it  Hope it helps you out  I am currently using this

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Copy this script to notepad and save as  vbs file  Drag amp Drop  js files on this script    ps  This will work only on windows   set objArgs   Wscript Arguments set objFso   CreateObject  Scripting FileSystemObject   content        Iterate through all the arguments passed for i   0 to objArgs count       on error resume next      Try and treat the argument like a folder     Set folder   objFso GetFolder objArgs i        If we get an error  we know it is a file     if err number  lt  gt  0 then          This is not a folder  treat as file         content   content  amp  ReadFile objArgs i       else          No error  This is a folder  process accordingly         for each file in folder Files             content   content  amp  ReadFile file path          next     end if     on error goto 0 next   Get system Temp folder path set tempFolderPath   objFso GetSpecialFolder 2   Generate a random filename to use for a temporary file strTempFileName   objFso GetTempName  Create temporary file in Temp folder set objTempFile   tempFolderPath CreateTextFile strTempFileName   Write content from JavaScript files to temporary file objTempFile WriteLine content  objTempFile Close   Open temporary file in Notepad set objShell   CreateObject  WScript Shell   objShell Run  Notepad exe    amp  tempFolderPath  amp       amp  strTempFileName    function ReadFile strFilePath       If file path ends with   js   we know it is JavaScript file     if Right strFilePath  3      js  then                set objFile   objFso OpenTextFile strFilePath  1  false           Read entire contents of a JavaScript file and returns it as a string         ReadFile   objFile ReadAll  amp  vbNewLine         objFile Close     else          Return empty string         ReadFile          end if   end function

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Script grouping is counterproductive  you should load them in parallel using something like http   yepnopejs com  or http   headjs com

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I usually have it on a Makefile     All  js compiled into a single one  compiled   path of js main js  compile       find   path of js -type f -name    js    xargs cat  gt    compiled    Then you run   make compile   I hope it helps

User · Answer

Just combine the text files and then use something like the YUI Compressor  Files can be easily combined using the command cat   js  gt  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

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If you re running PHP  I recommend Minify because it does combines and minifies on the fly for both CSS and JS  Once you ve configured it  just work as normal and it takes care of everything

User · Answer

You can use KjsCompiler  https   github com knyga kjscompiler Cool dependency managment

[javascript] Combine multiple JavaScript files into one JS file

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