HTML5n
HTML5n is a proposed evolution of HTML5 designed to address contemporary web development needs while maintaining compatibility with existing HTML5 content. Conceptually, HTML5n aims to provide a small, opt-in extension surface that enhances performance, accessibility, offline capabilities, and developer ergonomics without forcing a break with current markup. It is not a formal standard and has not been published by standards organizations such as WHATWG or W3C. Instead, it has appeared in blogs, talks, and community projects as a design concept and a thought experiment about future web markup.
Origins trace to discussions in the 2020s among educators and developers exploring ways to improve declarative
In practice, proponents describe HTML5n as additive and backwards compatible, allowing authors to opt into features
Typical design goals include improved accessibility semantics by providing clearer roles and states by default, optional
See also: HTML5, WHATWG, W3C, Web Components, Progressive Web Apps.