Node.js: Is there any documentation about the process.env variable

Question

I use process.env a little in my program, it seems this variable have nothing to do with my program， without it my app could work well, too.

So how can I fully use the process.env? Is there any document or tutorial about it?

Answer 1

Try this link http://nodejs.org/api/process.html#process_process_env

Then you can make a small program in nodeJS:

console.log(process.env)

And run it

$ node myProgram.js

{ TERM_PROGRAM: 'iTerm.app',
  TERM: 'xterm',
  SHELL: '/bin/bash',
  CLICOLOR: '1',
  TMPDIR: '/var/folders/ff/59np25p96x95hpgbtsv3r6zr0000gn/T/',
  Apple_PubSub_Socket_Render: '/tmp/launch-LIiu0r/Render',
  OLDPWD: '/Users/hermanjunge',
  USER: 'hermanjunge',
  COMMAND_MODE: 'unix2003',
  SSH_AUTH_SOCK: '/tmp/launch-XOMy7j/Listeners',
  __CF_USER_TEXT_ENCODING: '0x1F5:0:0',
  Apple_Ubiquity_Message: '/tmp/launch-jiZQH0/Apple_Ubiquity_Message',
  LSCOLORS: 'ExFxCxDxBxegedabagacad',
  PATH: '/Users/hermanjunge/.rbenv/shims:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin:/usr/local/git/bin:/usr/local/mysql/bin',
  PWD: '/tmp',
  ITERM_PROFILE: 'hermanjunge',
  SHLVL: '1',
  COLORFGBG: '7;0',
  HOME: '/Users/hermanjunge',
  ITERM_SESSION_ID: 'w1t4p0',
  LOGNAME: 'hermanjunge',
  LC_CTYPE: 'UTF-8',
  DISPLAY: '/tmp/launch-HCtQeC/org.macosforge.xquartz:0',
  _: '/usr/local/bin/node' }

Then, we learned that we can get elements from the environment we are running our app. Like, for example:

console.log(process.env.PWD);

Which returns

/tmp

And so on...