SparkPost/heml
Heml
Heml is a framework providing a custom markup language and compiler designed to generate responsive HTML and CSS for consistent rendering across email clients. It functions as a system for transforming specialized markup strings into deliverable email templates and associated metadata.
The project features a component system for defining reusable custom elements and style rules to standardize design patterns. It includes a responsive layout engine that converts flexible grid structures, columns, and rows into compatible fixed-width tables and fluid layouts.
The toolset covers email metadata management for subject lines and preview text, validation-aware rendering to capture structural errors, and a development environment with real-time file watching and browser previews.
Features
- Email Markup Renderers - Provides a specialized markup language and renderer to generate responsive HTML and CSS for consistent email client rendering.
- Markup Compilers - Transforms specialized custom markup strings into optimized, email-compatible HTML and CSS during the build process.
- Custom Element Definitions - Implements a system for defining custom elements and tags to create a reusable library of email components.
- Email Component Libraries - Offers modular UI primitives optimized for the constraints of email-safe HTML and CSS.
- Cross-Client Email Rendering - Ensures that custom markup generates HTML and CSS that render consistently across various email service providers.
- Email Design Systems - Provides a standardized collection of modular components to maintain visual consistency in email design.
- Email Frameworks - Ships a framework for building flexible, responsive email layouts with grid structures that scale across different screen widths.
- Column-Based Responsive Grids - Converts flexible column and row definitions into fluid, email-compatible table layouts.
- Responsive Layout Engines - Implements a layout engine that automatically adapts email grid structures to fit various screen sizes.
- Email Templates - Generates responsive HTML email communications from a specialized markup-based system.
- Email - Implements a compiler that transforms custom markup strings into validated, deliverable email HTML and metadata.
- Responsive Email Design - Facilitates the creation of HTML emails that adapt fluidly to different screen sizes and clients.
- Email Header Generation - Extracts metadata from markup to automatically generate email subject lines and preview snippets.
- Real-time Generation Previews - Provides immediate visual feedback in the browser as email markup templates are edited.
- Markup Structural Validation - Captures and reports syntax and structural errors while converting custom markup into final HTML.
- Email Template Previews - Provides local rendering of email templates for instant visual verification during development.
- Inbox Preview Controls - Controls how emails appear in inbox snippets by defining subject and preview text.
- Email Style Frameworks - Provides a system of CSS patterns for controlling colors and spacing across diverse email clients.
Star history
How this analysis was created: This summary and feature list are AI-generated from collected project material and can contain mistakes. Stars, license and language are imported from GitHub. Inclusion does not mean that we have tested or audited this project. Check the source documentation for any feature you depend on. Learn more on our About page.
