Haml
Business Profile
Core Value Proposition
Haml provides a markup language for HTML templating that is clean, DRY, well-indented, and accelerates template creation.
Target Customer
Ruby on Rails developers and web development teams seeking cleaner, faster HTML templates and easier maintenance.
Key Differentiator
Indentation-based syntax that describes HTML structure, reducing repetition and improving readability; acts as a drop-in replacement for ERB and emphasizes well-structured, human-friendly markup.
Implementation Timeline
Value can be realized quickly: a quick read of the tutorial (about 5 minutes) and an initial template conversion can be performed within tens of minutes; users reported rapid adoption and continued use after trying it.
Pain Points
- 1HTML templates can be repetitive and verbose (DRY concerns).
- 2Readability and indentation of templates can be poor with traditional HTML/ERB approaches.
- 3ERB requires more boilerplate and can lead to less readable templates.
Key Features
- 1Indentation-based nesting to define HTML structure
- 2Tag syntax using a percent sign (e.g., %div, %strong) and Ruby code embedding with =
- 3Attributes defined via Ruby hash or CSS-like shorthand (.class, #id)
- 4Default to %div when no tag is specified
- 5Drop-in replacement for ERB, integration with Rails
- 6MIT License (open source)
Target Customer Industries
Decision Makers
- 1CTO
- 2Head of Engineering
- 3Lead Developer
- 4Engineering Manager
Client Results
- 1Faster template development and production speed
- 2Improved readability and maintainability of templates
- 3Cleaner, DRY HTML templates with less boilerplate
Competitive Advantages
- 1DRY (Don't Repeat Yourself) markup reduces repetition
- 2Well-indented, readable templates improve maintenance
- 3Indentation-based structure clarifies HTML hierarchy
- 4Faster template creation and production speed
- 5Open source under the MIT License
Key Benefits
Case Studies & Success Stories
Unspace Interactive and professional Rails shops using Haml exclusively
Haml is valued for its cleanliness, readability, and production speed, and is used exclusively in projects by Unspace Interactive and several other Rails-focused shops.
Additional Product Information
Product Description
Haml is a markup language that cleanly and simply describes the HTML of web documents without inline code, serving as a replacement for inline templating systems like PHP, ASP, and ERB.
Target Market
Ruby on Rails developers, web development teams, and design/agency shops building web applications.
Unique Value Proposition
A markup language that describes HTML through indentation, delivering readable, DRY templates with faster development compared to traditional HTML/ERB approaches.
Technical Requirements
Requires Ruby and Rails integration; used as a drop-in replacement for ERB; templates can be mixed with ERB during migration; gem installation is assumed in tutorials
Pricing Model
MIT License (open source, free to use and modify)
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