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Publishing Modules

Deno is not prescriptive about how developers make their modules available—modules may be imported from any source. To help publish and distribute modules, separate standalone solutions are provided.

Publishing on deno.land/x

A common way to publish Deno modules is via the official https://deno.land/x hosting service. It caches releases of open source modules and serves them at one easy to remember domain.

To use it, modules must be developed and hosted in public repositories on GitHub. Their source is then published to deno.land/x on tag creation. They can then be accessed by using a url in the following format:

https://deno.land/x/<module_name>@<tag_name>/<file_path>

Module versions are persistent and immutable. It is thus not possible to edit or delete a module (or version), to prevent breaking programs that rely on this module. Modules may be removed if there is a legal reason to do so (for example copyright infringement).

For more details, see Adding a Module.

Auto-generating documentation for modules

When a module is published, the contents of the module is analyzed. An automated process identifies modules that contain code that Deno understands and generates documentation based on the code. For each path, including the root path, it attempts to identify the default module. In order of preference it looks for mod, lib, main, or index files with an extension that Deno understands (ts,tsx,js,jsx,mjs, or mts). When viewing the documentation for the module for a path, the default module will shown.

If a default module cannot be identified, a list of modules that can be documented will be provided instead. When generating the documentation, not only is the actual code parsed to generate it, inline documentation, in the form of JSDoc (/** */) is used to enrich the documentation. Many JSDoc tags are supported. To provide module level documentation (which also becomes the path level documentation when it is included in a default module), use the @module tag at the end of the first JSDoc block in the module.

Publishing Deno modules for Node.js/npm

We have built a tool that assists in the process of taking Deno specific code and publishing it to npm to work under Node.js or other parts of the JavaScript ecosystem. See dnt - Deno to Node.js Transform.