HTMLintos

HTMLintos is a hypothetical web technology that extends HTML with a lightweight templating and data-binding layer. It enables developers to write standard HTML augmented by declarative directives, which are compiled to pure HTML, CSS, and JavaScript at build time or on the fly. The aim is to combine the familiarity of HTML with reactive behavior and component composition without the overhead of a full framework.

Core concepts include reusable components, scope-bound data, and directive attributes prefixed with into- that express conditional rendering, iteration, and event handling. Typical directives include into-if for conditional rendering, into-for for iteration, into-bind for data binding, and into-on for event handling. Components can be composed by nesting, and data flows through attributes or placeholder expressions within the markup.

Syntax and workflow: the markup resembles HTML but uses the into- attributes to declare behavior. A typical workflow employs a transpiler or runtime that processes these directives and outputs standard DOM updates, allowing developers to work with familiar HTML structures. Non-directive HTML remains untouched, enabling progressive enhancement and easy integration with existing pages and libraries.

Limitations and tooling: adoption is fragmented and there is no formal standard. Most implementations require a build step or small runtime, and compatibility varies across environments. Performance depends on the complexity of templates and the efficiency of the directive processor. As a result, HTMLintos is mainly used in experimental projects, educational contexts, or scenarios seeking lightweight, HTML-first reactivity without a full framework.

History and status: the concept emerged in the early 2020s within a small open-source community. Several independent projects have explored HTMLintos-inspired approaches. It remains unclear whether it will gain broad traction or be superseded by other templating and component ecosystems.