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🦅 cli syntax highlighting: any function - any object - 176 languages

Figure 00

Fork notice

This is Truffle's customized fork of Chromafi. The original Chromafi can be found here.

The differences are as follows:

  1. This fork allows colors to continue across lines.
  2. This fork exposes the hljs object as chromafi.hljs so that it can be modified.
  3. This fork uses lodash.merge instead of deepmerge for Webpack compatibility.
  4. This fork has removed the ansi-mark functionality and dependency.


Support the development of Chromafi by becoming a patreon.


  • JavaScript objects that are logged to the console... still look like JavaScript objects.
  • Chromafi highlights JavaScript functions.
  • Adjust indentation for tabbed code with Chromafi.
  • User defined color palettes.
  • Line numbers optional.
  • Padding adjustment for use with background colors or tight spaces.
  • Chromafi also highlights strings of code in 176 languages.


Chromafi a JavaScript Object

const chromafi = require('chromafi')

const obj = {
    foo: 'bar',
    baz: 1337,
    qux: true,
    zxc: null,
    'foogle-bork': function (a, b) {
        return b - a

const chromatastic = chromafi(obj)


Figure 01

Chromafi a JavaScript Function

const chromafi = require('chromafi')

function add (a, b) {
    return a + b

const chromantic = chromafi(add)


Figure 02

Chromafi a String of Code

const chromafi = require('chromafi')

const codeString = `
// Creates a Class based on Type
const create = (kind, parent) => {
    // Create the Class based on the Type's
    // Constructor or use an Anon. Func
    const protoclass = kind.ctor || function () {}

    // Inherit from a parent object
    if (parent) {
        protoclass.prototype = new Parent()

    // Merge prototype from Class's Type
    if (kind.proto) {
        merge.call(protoclass.prototype, kind.proto)

    return protoclass

const chromadactic = chromafi(codeString)


Figure 03


const chromafi = require('chromafi')
const chalk = require('chalk')

const obj = {foobar: 1337}

const options = {
    lineNumberPad: 0,
    codePad: 0,
    indent: 2,
    lineNumbers: true,
    colors: {
        base: chalk.bgBlack.white.bold,
        line_numbers: chalk.bgCyan.black

const chromafanatic = chromafi(obj, options)


Figure 04

Light Color Scheme

Chromafi uses Chalk to write ANSI color codes to the terminal.

const chromafi = require('chromafi')

const chromafi = require('.')
const chalk = require('chalk')

const obj = {
    foo: 'bar',
    baz: 1337,
    qux: true,
    zxc: null,
    'foogle-bork': function (a, b) {
        return b - a

const chromafantastic = chromafi(obj, {
    colors: {
        base: chalk.bgWhite.black.bold,
        keyword: chalk.red,
        number: chalk.blue.dim,
        function: chalk.black,
        title: chalk.blue,
        params: chalk.black,
        string: chalk.black,
        built_in: chalk.blue,
        literal: chalk.blue,
        attr: chalk.black,
        // Just pass `chalk` to ignore colors
        trailing_space: chalk,
        regexp: chalk.blue,
        line_numbers: chalk.bgBlue.white


Figure 05

Highlighting Other Languages

Chromafi uses Highlight.js to syntax highlight to your code. This means Chromafi can highlight any language that Highlight.js can.

Let's Chromafi some assembler syntax:

const chromafi = require('chromafi')

const armAssemblyCode = `

.global connect
    mov     r3, #2              ; s->sin_family = AF_INET
    strh    r3, [sp]
    ldr     r3, =server_port    ; s->sin_port = server_port
    ldr     r3, [r3]
    strh    r3, [sp, #2]
    ldr     r3, =server_addr    ; s->sin_addr = server_addr
    ldr     r3, [r3]
    str     r3, [sp, #4]
    mov     r3, #0              ; bzero(&s->sin_zero)
    str     r3, [sp, #8]
    str     r3, [sp, #12]
    mov     r1, sp      ; const struct sockaddr *addr = sp

    ldr     r7, =connect_call
    ldr     r7, [r7]
    swi     #0

    add     sp, sp, #16
    pop     {r0}        ; pop sockfd

    pop     {r7}
    pop     {fp, ip, lr}
    mov     sp, ip
    bx      lr

socket_call:   .long 281
connect_call:  .long 283

/* all addresses are network byte-order (big-endian) */
server_addr:            .long 0x0100007f ; localhost
server_port:            .hword 0x0b1a

const chromalicious = chromafi(armAssemblyCode, {lang: 'arm'})


Figure 06

Supported Languages

1c, abnf, accesslog, actionscript, ada, apache, applescript, arduino, armasm, asciidoc, aspectj, autohotkey, autoit, avrasm, awk, axapta, bash, basic, bnf, brainfuck, cal, capnproto, ceylon, clean, clojure-repl, clojure, cmake, coffeescript, coq, cos, cpp, crmsh, crystal, cs, csp, css, d, dart, delphi, diff, django, dns, dockerfile, dos, dsconfig, dts, dust, ebnf, elixir, elm, erb, erlang-repl, erlang, excel, fix, flix, fortran, fsharp, gams, gauss, gcode, gherkin, glsl, go, golo, gradle, groovy, haml, handlebars, haskell, haxe, hsp, htmlbars, http, hy, inform7, ini, irpf90, java, javascript, jboss-cli, json, julia-repl, julia, kotlin, lasso, ldif, leaf, less, lisp, livecodeserver, livescript, llvm, lsl, lua, makefile, markdown, mathematica, matlab, maxima, mel, mercury, mipsasm, mizar, mojolicious, monkey, moonscript, n1ql, nginx, nimrod, nix, nsis, objectivec, ocaml, openscad, oxygene, parser3, perl, pf, php, pony, powershell, processing, profile, prolog, protobuf, puppet, purebasic, python, q, qml, r, rib, roboconf, routeros, rsl, ruby, ruleslanguage, rust, scala, scheme, scilab, scss, shell, smali, smalltalk, sml, sqf, sql, stan, stata, step21, stylus, subunit, swift, taggerscript, tap, tcl, tex, thrift, tp, twig, typescript, vala, vbnet, vbscript-html, vbscript, verilog, vhdl, vim, x86asm, xl, xml, xquery, yaml, zephir


Thank you to the following Noun Project artists for the vectors used in the lead graphic.

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