24 June 2015

Following ember-sprinkling-in-components

Note, this was written using Ember 1.13.0.


Ember rendering Component

  • Like web components
  • Like react components
  • Just Ember without a router
  • Just Ember not a single page app (SPA)

Can make just an HTML page with one or more Ember apps on it (via rootNode)


Mitch Lloyd paired with me to bootstrap and write the core work of setting up an ember-cli components-only app, and for his work in writing Ember-Islands.

Many thanks as well to many others in the embercommunity slack for their assistance.

Getting Started

You’ll want to install npm, bower, and ember-cli and use a recent version of Node.js. Here’s what I did (on OSX):

#!/usr/bin/env bash
# http://www.ember-cli.com/user-guide/
# Install nvm and node https://github.com/creationix/nvm
set -e

install() {
 brew install "$@" || echo "$!"
configure_nvm() {
  # BEGIN add to ~/.bash_profile
  nvm_sh=$(brew --prefix nvm)/nvm.sh
  if [ -f $nvm_sh ]; then
    export NVM_DIR=~/.nvm
    source $nvm_sh
  # END add to ~/.bash_profile
mkdir -p ~/.nvm
install nvm || echo "$!"
nvm install $NODE_VERSION || echo "$!"
nvm use $NODE_VERSION --default

nvm --version  # 0.24.1
npm --version  # 2.10.1
node --version # v0.12.4

# Once you’ve installed Node, you’ll need to install the Ember CLI globally with:
npm install -g ember-cli
ember  --version # 0.2.7

# You’ll need to install Bower, a package manager that keeps your front-end dependencies (including JQuery, Ember, and QUnit) up to date. This is as easy as running:
npm install -g bower
bower --version # 1.4.7

# If you want to use PhantomJS to run your integration tests, it needs to be installed globally.
npm install -g phantomjs
phantomjs --version # 1.9.8

# If you want less-error-prone file change watching
install watchman
watchman --version # 3.1.0

Basic steps

An Ember CLI app for rendering Ember Components outside of an Ember app.

  1. Create and enter the directory for your Ember app: mkdir _ember; cd _ember.

  2. Pick a name for your Ember app, and create it: ember init --name=viewtastic (or ember init --dry-run --name=viewtastic to preview what files would be added/changed.).

  3. Generate a Component. Its name must have a hyphen. e.g. ember g component doc-printer.

  4. Config Brocfile.js (or ember-cli-build.js as needed/desired). See Gotchas below.

  5. Edit app/index.html to add a data component, e.g. <div data-component="doc-printer"></div>.

  6. Make it super easy to render Ember Components in a non-Ember app: ember install ember-islands.

  7. Build the Ember app assets: ember build -e production.

  8. Copy the desired assets into your non-Ember app: e.g. cp dist/assets/{vendor,viewtastic}.js ../assets/.

  9. Add the data-component element Ember-Islands is looking for and load the generated assets on the page(s) you want.

  10. Profit.

  11. Attend to the gotchas, below:

1) We need to disable ‘storeConfigInMeta’.

As the EmberCLI guide states

This meta tag is required for your ember application to function properly.

Because Ember doesn’t control our app’s html, we need to disable ‘storeConfigInMeta’.

[The meta] tag [will] be part of your compiled javascript files

2) We need to turn off ‘fingerprinting’ of our production-built assets.

We don’t want to have to change the script src in our site every time we change our Ember app. Per the EmberCLI guide

enabled - Default: app.env === 'production' - Boolean. Enables fingerprinting if true. True by default if current environment is production.

So, in our Brocfile.js, we have

var app = new EmberApp({
    storeConfigInMeta: false,
    fingerprint: {
      enabled: false

I’ve also disabled source maps, but this isn’t strictly necessary.

sourcemaps: {
  "enabled": false,
  "extensions": ["js"]

And I’ve also configured ember-cli to build the assets I want to dist/assets/

outputPaths: {
   app: {
     html: 'index.html',
     css: { 'app': '/viewtastic.css'},
     js: "/assets/viewtastic.js"
   vendor: {
     css: '/vendor.css',
     js: "/assets/vendor.js"

3) We need to dynamically compile our templates in development / test environments

So, in our Brocfile.js, we have

// see https://github.com/ember-cli/ember-cli/issues/3497
// consider ember-test-helpers
if (EmberApp.env() !== 'production') {

We also want to use ember-cli-htmlbars-inline-precompile to test our Component rendering:

Per Ember component integration tests:

    bower install --save ember-qunit#0.4.0
    npm install --save-dev ember-cli-qunit@0.3.14
    npm install --save-dev ember-cli-htmlbars-inline-precompile@0.1.1

Other changes from ember init


+    "ember-cli-htmlbars-inline-precompile": "^0.1.1",
+    "ember-cli-mirage": "0.1.5",
+    "ember-islands": "mitchlloyd/ember-islands",


+    "pretender": "~0.6.0",
+    "Faker": "~2.1.3"
// config/environment.js
+  // CONFIG ember-cli-mirage
+  if (environment === 'development') {
+    ENV['ember-cli-mirage'] = {
+        enabled: false
+    };
+  }

 ENV.contentSecurityPolicy = {
+      'script-src':  "'self' 'unsafe-eval' http://*:35729",
+      'font-src':    "'self'",
+      'connect-src': "'self' *",
+      'style-src':   "'self' 'unsafe-inline'",
+      'object-src':  "'self' data:",
+      'img-src':     "'self' data:"
+    };
+    // keep test console output quieter
+    ENV.APP.rootElement = '#ember-testing';
+  }
+  if (environment === 'production') {
+    // CORS configuration
+    ENV.contentSecurityPolicy = {
+      'script-src':  "'self' 'unsafe-eval' http",
+      'font-src':    "'self'",
+      'connect-src': "'self' *",
+      'style-src':   "'self' 'unsafe-inline'",
+      'object-src':  "'self' data:",
+      'img-src':     "'self' data:"
+    };
+  }
<script src="assets/vendor.js"></script>
<script src="assets/viewtastic.js"></script>
<div data-component="doc-printer"></div>

References and further reading:

(This area will be updated)

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