Templ is a type-safe HTML templating engine and UI framework for Go. It provides a system for building reusable HTML components that compile into Go code for server-side rendering, ensuring type safety and compile-time validation of data and logic.
The project features a dedicated language server that provides autocomplete and syntax validation for template files within supported code editors. It employs compile-time code generation to transform a custom template language into Go source code, enabling the creation of modular HTML fragments and logic blocks.
The framework includes automated security mechanisms to prevent cross-site scripting through HTML escaping, CSS class and value sanitization, and resource URL validation. It supports various output targets, including streaming content to response writers for web interfaces or producing standalone files for static site generation.
A command line interface is provided to handle the generation of Go source code and the formatting of markup and template files.