Emblem.js - Ember-friendly, indented syntax alternative for Handlebars.js
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Emblem.js is an indentation-based templating language that prints Handlebars.js templates. Specifically, it targets Ember.js templates.

Emblem's syntax most closely resembles that of the Slim templating language. Please see the Emblem docs site for a full explanation of the syntax, and check out Try Emblem.

Also check out the Embercast on Emblem.js

Installation with Ember-CLI

To use Emblem with Ember-CLI, use the ember-cli-emblem addon.

Handlebars Version Dependencies

As of Emblem 0.5.0, the compiler is really a template printer. Previous versions compiled to Handlebars AST nodes and were forced to target specific versions of Handlebars. The move to printing has eliminated that restriction, and Emblem 0.5.0 should be compatible with any version of Handlebars.

For posterity, here is a history of Emblem and Handelbars compatibility across revisions.

  • HTMLBars: Emblem 0.5.0+
  • Handlebars 2.0.0: Use Emblem ~0.4.0, or 0.5.0+
  • Handlebars 1.0.0: Use Emblem ~0.3.0, or 0.5.0+
  • Handlebars <= 1.0.0.rc4: Use Emblem <= 0.2.9, or 0.5.0+

Query params

Emblem uses the following syntax: = link-to 'index' (query-params foo="wat")

Ember query params documentation

Syntax Examples

Emblem.js Syntax

Using Emblem in your application

Previous versions of Emblem have supported a "vanilla" Handlebars mode. The intent was that Ember-specific helpers could be avoided.

Emblem 0.5.0 dropped support for vanilla template compilation, but we would like to bring it back. Please refer to VANILLA_HANDLEBARS.md for more context.

Compiling in the Browser

For pre-0.5.0, follow the pattern in this JSBin:

  1. Include Handlebars
  2. Include Emblem
  3. Include Ember

A globals build of Emblem appropriate for JSBins should be completed before 0.5.1 is released. See #212.

Via Rails 3.1+

For pre-0.5.0, add the following to your Gemfile:

gem 'emblem-rails'

emblem-rails presently depends on ember-rails. With these two gems, any templates ending in .emblem will be (pre)compiled with Emblem.js.

Also, check out the demo app which uses the above configuration.

Updates to Emblem syntax do not require an update to emblem-rails. To update to the latest Emblem, you can run:

bundle update emblem-source

Emblem Build Tools

Compatible with 0.5.0+:

  1. ember-cli-emblem
  2. gulp-emblem-printer

Compatible with pre-0.5.0:

  1. emblem-rails
  2. barber-emblem, a Precompilation library for Ruby (used in ember-rails)
  3. emblem-brunch, Emblem support for Brunch.io
  4. Mimosa (support for Emblem since v 0.10.1)
  5. grunt-emblem, Emblem support for Grunt (and Yeoman)
  6. gulp-emblem, Emblem support for gulp

Building Emblem.js

Clone the repo, then run:

npm install
bower install
ember build -e production

Running tests in the browser requires broccoli-cli to be installed.

To run tests in the browser, run:

broccoli serve

The tests will be available at http://localhost:4200/tests/.

To run tests in Phantom and Node (which is how CI runs), use:

npm test

Syntax Highlighting

Check out vim-emblem for Vim editor support for Emblem.

Otherwise, for now, please refer to syntax highlighting solutions for Slim, which is not much different from Ember's. At some point, we'll have something even more custom tailored to Emblem (feel free to take a swing at it and send in a PR).

Reporting Bugs

If you find a bug in Emblem syntax, please try to reproduce it in its simplest form with this JSBin before reporting an issue, which will help me nail down the source of the issue.

Bitdeli Badge

Emblem was authored and released by Alex Matchneer (@machty).

The Emblem 0.5.0 release was generously funded by Vestorly. Vestorly is a technology company solving the content marketing problem for individual professionals, small businesses, and the enterprises that support them. Vestorly's user interface is built entirely with Ember.js and modern web technologies. Vestorly is hiring!