MJML Browser Build

MJML Browser (`mjml-browser`) is the client-side build of the MJML framework, designed for rendering responsive email templates directly within web browsers. This package, currently stable at version 5.0.1, allows developers to integrate MJML compilation into front-end applications, email builders, or interactive preview environments without requiring a Node.js backend. The MJML project maintains an active release cadence, frequently publishing alpha and beta versions alongside stable updates, indicating ongoing development and feature enhancements. While providing the core MJML rendering capabilities, `mjml-browser` differentiates itself from the full `mjml` Node.js package by its strict browser-only execution environment. This means certain server-side features, such as `mj-include` for modular templating and `.mjmlconfig` for custom components, are intentionally unsupported and ignored. Version 5 introduced significant changes, including a switch to `htmlnano` and `cssnano` for optimized HTML and CSS minification, which may affect output formatting compared to previous major versions.