Broccoli.js from scratch

We'll install and configure Broccoli using a hello world website. Then we'll add a couple of Broccoli plugins for common tasks like loading assets and bundling CSS.

All the code for this example can be found here: broccolijs-from-scratch


Install Node.

node -v

npm -v

Project setup

mkdir broccolijs-from-scratch
cd broccolijs-from-scratch
npm init

Answer the questions and the result will be the file package.json.

Install Broccoli

# broccolijs-from-scratch/
npm install -g broccoli@1.0.0-beta.7
npm install --save-dev broccoli

Create an index.html file.

<!DOCTYPE html>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="description" content="">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <h1>Broccoli.js hello world</h1>

Config Broccoli

We will install a Broccoli plugin that allows us to load files into Broccoli trees.

npm install --save-dev broccoli-funnel

Create the file Brocfile.js and add:

var funnel = require('broccoli-funnel');

// the variable `html` now holds a Broccoli tree
var html = funnel('.', {
  files   : ['index.html'],
  destDir : '/'

module.exports = html;

Save the file and build the site:

broccoli build dist

Open in you browser the file dist/index.html and you'll see:

Broccoli.js hello world

Adding Styles

We'll install two Broccoli plugins:

# concatenates the files in a Broccoli tree
npm install --save-dev broccoli-concat

# allows us to merge two Broccoli trees into one
npm install --save-dev broccoli-merge-trees

We add the file style.css with:

body {
  margin: 30px;

In Brocfile.js we add:

var concat = require('broccoli-concat');
var mergeTrees = require('broccoli-merge-trees');

var styles = concat('.', {
               inputFiles : ['style.css'],
               outputFile : '/site.css'

module.exports = mergeTrees([html, styles]);

The final CSS file must be included in index.html:

<link rel="stylesheet" href="site.css">

Rebuild and verify the changes:

rm -r dist/ && broccoli build dist
# visit dist/index.html


We'll add a third party stylesheet that makes use of font files.

In index.html add:

<i class="icon-emo-grin red"></i></a>
<i class="icon-emo-grin green"></i></a>
<i class="icon-emo-grin blue"></i></a>

In style.css add:

.red, .green, .blue {
  font-size: 7rem;

.red {
  background-color: red;
.green {
  background-color: green;
.blue {
  background-color: blue;

In Brocfile.js add:

var styles = concat('.', {
               inputFiles : ['style.css',
               outputFile : '/site.css'

var fonts = funnel('fontello/font', {
  files   : ['fontello.woff',
  destDir : '/font'

module.exports = mergeTrees([html, styles, fonts]);

This time a server will be needed for us to see the changes:

broccoli serve
# visit http://localhost:4200/

Gastón I. Silva