Emblem.js
An indentation-based templating language that compiles to Handlebars.js templates, specifically designed for Ember.js.
What is Emblem.js?
Emblem.js is an indentation-based templating language that compiles to Handlebars.js templates. It provides a cleaner, more concise syntax alternative to traditional Handlebars, specifically optimized for use with Ember.js applications. The language reduces visual noise by using whitespace for structure rather than explicit closing tags.
Ember.js developers who want more readable and maintainable templates, particularly those working on larger applications where template complexity can become unwieldy.
Developers choose Emblem.js for its elegant syntax that reduces boilerplate while maintaining full compatibility with Handlebars and Ember.js. It offers the expressiveness of languages like Slim or HAML within the Ember ecosystem without sacrificing functionality.
Overview
Emblem.js - Ember-friendly, indented syntax alternative for Handlebars.js
Use Cases
Best For
- Ember.js projects needing cleaner template syntax
- Teams preferring indentation-based languages over bracket-heavy templates
- Large Ember applications where template readability is critical
- Developers familiar with Slim or HAML who want similar syntax in Ember
- Projects using Handlebars that want reduced visual clutter
- Ember-CLI projects through the ember-cli-emblem addon
Not Ideal For
- Projects not using Ember.js, as Emblem.js is tightly coupled with Ember's templating system and dropped vanilla Handlebars support in version 0.5.0
- Teams that prefer explicit, tag-based syntax over indentation-sensitive languages, due to potential formatting errors and learning curve
- Applications requiring minimal build tooling, since Emblem.js adds an extra compilation step to generate Handlebars templates
- Developers needing a templating language with broad community support outside the Ember ecosystem
Pros & Cons
Pros
Emblem.js uses indentation-based structure similar to Slim or HAML, reducing visual clutter and boilerplate in templates, as emphasized in its philosophy for cleaner code.
Specifically targets Ember.js templates and helpers, with easy setup via the ember-cli-emblem addon, ensuring compatibility within Ember's ecosystem.
Compiles directly to standard Handlebars.js templates, allowing seamless use with existing Handlebars tooling and versions, including HTMLBars.
The compiler acts as a template printer, making it compatible with various Handlebars versions, as detailed in the README's version history from 0.5.0 onwards.
Cons
Vanilla Handlebars support was dropped in version 0.5.0, restricting its use to Ember.js applications, which the README acknowledges and notes as a potential future restoration.
Indentation-based syntax can introduce subtle bugs if formatting is inconsistent, requiring careful attention that may not suit all development workflows.
Being tailored for Ember.js, it has a smaller community and fewer resources compared to mainstream templating languages, which could impact support and adoption.
Frequently Asked Questions
Found a gem we're missing?
Open-Awesome is built by the community, for the community. Submit a project, suggest an awesome list, or help improve the catalog on GitHub.