1.0.0 • Public • Published

Rainbow Barf

Make terminal output pretty

Circle CI npm David Coveralls


So here's the deal ... the world doesn't need any more add Ansi codes to strings for terminal output in node utilities. But as a programmer, of course I built this for the sake of building it. So if you are looking for a utility to make your node terminal output look pretty, check out one of these projects:

If you still want to install it,

npm install rainbow-barf


  var RainbowBarf = require('rainbow-barf');
  var log = new RainbowBarf();

  // pass in styles as a second argument
  log('this message is red', '-c:red');

  // styles can be a string
  log('this one is blue and underlined and bold', '-c:blue -ub');

  // styles can also be an array
  log('this one is yellow with a bright blue background and bold', ['c:yellow', 'k:bright_blue', 'b']);

  // styles can also be an object
  log('this one is black on white and blinking', {
    color: 'black',
    background: 'white',
    formatting: ['blink']

  // I'm trying to be pretty easy going. Do what feels right

available options


b        text is bold

i        text is italic

u        text is underlined

l        text blinks

r		reverse formatting


c:color               format text with specified named color. See below for available colors.

k:background-color    format text with background-color of specified name. See below for available colors.

Inline formatting

-n        do NOT add new line ('\n') after message

Available Colors

demo output


// log a message in the default text color with default formatting

// log a message in bold
log('message', ['b']);

// log a message in red
log('message', ['c:red]);

// log a message in blue with a white background
log('message', ['c:blue', 'k:white']);

// log a message in blue in bold and underlined
log('message', ['c:blue', 'b', 'u']);

// for emphasis options, you can just group those together if you want
log('message', ['c:blue', 'bu']);

Logging diffent formatting inline with -n

log('useage: ', ['bn']);
log('log', ['un']);
log(' [-biulrn] [-c color] [-k background]');

would log

inline ouput

Log somewhere else

If you have a super cool custom logger and you want to rainbow barf on that, the RainbowBarf constructor can take that as an argument (By default RainbowBarf will output to process.stdout.write). Check it:

var RainbowBarf = require('rainbow-barf');

function anyFunctionThatTakesAStringAsAnArgument (message) {
  console.log('[so cool]:', message);

var log = new RainbowBarf(anyFunctionThatTakesAStringAsAnArgument);

log('now we\'re logging to console!!', ['c:bright_red', 'l']);

Let's be honest, I just did this so I could write tests for this. Peace!


WTFPL © Nathan Stilwell. Choose Freedom.




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