How do you run JavaScript script through the Terminal

Question

For instance  if you were to run a Python script you would type python filename py or if you wanted to run a C program make filename then    filename  How do you do this with  js files

User · Answer

You can also use phantomjs Download phantomjs depending on the system  my case is Max OSX  from phantomjs org  You should put the path to phantomjs installation folder on the top of your javascript file  eg      bin phantomjs Save your code  Go to the terminal where your javascript is saved and you can run using  gt  phantomjs filename js

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It is crude  but you can open up the Javascript console in Chrome  Ctrl Shift J  and paste the text contents of the   js file and hit Enter

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This is a  roundabout  solution but you could use ipython  Start ipython notebook from terminal     ipython notebook  It will open in a browser where you can run the javascript

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You can use a shebang file   script js    usr bin env node console log  Hello terminal     And run it   script js  Don t forget to chmod  x script js

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Alternatively  if you re just looking to play around with Javascript a nice in browser option is Codecademy s Javascript Lab   They also have a Python and Ruby IDE

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I tried researching that too but instead ended up using jsconsole com by Remy Sharp  he also created jsbin com   I m running on Ubuntu 12 10 so I had to create a special icon but if you re on Windows and use Chrome simply go to Tools Create Application Shortcuts  note this doesn t work very well  or at all in my case  on Ubuntu   This site works very like the Mac jsc console  actually it has some cool features too  like loading libraries code from a URL  that I guess jsc does not   Hope this helps

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All the answers above are great  I see one thing missing and could be considered for running javascripts   js  files  the unrelated brother of javascript the Java   JDK comes up with two nice tools  could be utilized for executing javascripts  Here are command goes like  Make sure to navigate to JDK bin    jjs example js   Its comes up with another commmand tool that goes like this-   jrunscript example js   I hope this may be helpful to others

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If you re using MacBook     Set up node js in your system and open up the terminal  Navigate to the directory  where the js file is saved  To execute run node  lt filename js gt    example  if filename is script js run node script js

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Another answer would be the NodeJS       Node js is a platform built on Chrome s JavaScript runtime for easily building fast  scalable network applications  Node js uses an event-driven  non-blocking I O model that makes it lightweight and efficient  perfect for data-intensive real-time applications that run across distributed devices    Using terminal you will be able to start it using node command     node  gt  2   4 6  gt     Note  If you want to exit just type   exit   You can also run a JavaScript file like this   node file js      Install it NOW

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You would need a JavaScript engine  such as Mozilla s Rhino  in order to evaluate the script - exactly as you do for Python  though the latter ships with the standard distribution   If you have Rhino  or alternative  installed and on your path  then running JS can indeed be as simple as   gt  rhino filename js   It s worth noting though that while JavaScript is simply a language in its own right  a lot of particular scripts assume that they ll be executing in a browser-like environment - and so try to access global variables such as location href  and create output by appending DOM objects rather than calling print   If you ve got hold of a script which was written for a web page  you may need to wrap or modify it somewhat to allow it to accept arguments from stdin and write to stdout    I believe Rhino has a mode to emulate standard browser global vars which helps a lot  though I can t find the docs for this now

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If you are on a Windows PC  you can use WScript exe or CScript exe  Just keep in mind that you are not in a browser environment  so stuff like document write or anything that relies on the window object will not work  like window alert  Instead  you can call WScript Echo to output stuff to the prompt   http   msdn microsoft com en-us library 9bbdkx3k VS 85  aspx

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Use node js for that  here is example how to install node by using brew on mac   brew update  amp  amp  install node   Then run your program by typing node filename js  and you can use console log   for output

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Technically  Node js isn t proper JavaScript as we know it  since there isn t a Document Object Model  DOM   For instance  JavaScript scripts that run in the browser will not work  At all  The solution would be to run JavaScript with a headless browser  Fortunately there is a project still active  Mozilla Firefox has a headless mode   https   developer mozilla org en-US docs Mozilla Firefox Headless mode     Applications Firefox app Contents MacOS firefox -headless index html     You are running in headless mode

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If you have a Mac you can get jsc a javascript console in OS X  Terminal  by typing   System Library Frameworks JavaScriptCore framework Versions Current Resources jsc   in Terminal app   You could also run one of your  js script by adding its name as an argument for jsc  like this   jsc your awesome script name js   Notice  I use console log   during development but jsc needs the debug   function instead   On Ubuntu you have some nice ECMAScript shells at your disposal  Between them it s worth to mention SpiderMonkey  You can add It by sudo apt-get install spidermonkey  On Windows as other people said you can rely on cscript and wscript directly built on the OS   I would add also another    way of thinking to the problem  if you have time and like to learn new things i d like to mention coffee-script that has its own compiler console and gives you super-correct Javascript out  You can try it also on your browser  link  try coffeescript

User · Answer

On Ubuntu  install  libjavascriptcoregtk-3 0-bin and use  usr bin jsc  manpage

User · Answer

All you have to do to run a js file via bash is type    node filename js  This is similar to in python  when you do    python filename py

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