`jsr.json` file

JSR packages need to contain a configuration file that specifies the name, version, and exports of a package. This file should be named jsr.json or jsr.jsonc. When using Deno, all properties of the jsr.json configuration file can instead be placed in the deno.json.

// jsr.json / deno.json
{
  "name": "@luca/greet",
  "version": "1.0.0",
  "exports": "./mod.ts"
}

name

The name field is the name of your package, prefixed with a JSR scope. Learn more about scope and package names.

version

The version field is the version of your package, which must be a valid SemVer version. You must increment the version of your package every time you publish a new version. Learn more about package versions.

exports

The exports field tells JSR which modules should be importable by users of your package. The exports field can either be specified as a single string, or as an object mapping entrypoint names to paths in your package.

// jsr.json / deno.json
{
  "name": "@luca/greet",
  "version": "1.0.0",
  "exports": {
    ".": "./mod.ts",
    "./greet": "./greet.ts"
  }
}

In the above example, the exports field is an object. The . entrypoint is the default entrypoint for the package. The ./greet entrypoint is a named entrypoint. With this entrypoint can import the greet.ts module using import { greet } from "@luca/greet/greet"; and the mod.ts module using import { greet } from "@luca/greet";.

You can also specify the exports field as a single string. This is useful if you only have a single entrypoint in your package. It is semantically equivalent to specifying a default entrypoint in the object form.

// deno.json
{
  "name": "@luca/greet",
  "version": "1.0.0",
- "exports": {
-   ".": "./mod.ts"
- }
+ "exports": "./mod.ts"
}

include and exclude

You can also use the include and exclude options to include and exclude files during publishing. When using a deno.json, you can use publish.include and publish.exclude to include and exclude files only for publishing, rather than for all Deno subcommands. Learn more about filtering files.

JSON Schema

A JSON schema file is available for editors to provide autocompletion. The file is versioned and available at: https://jsr.io/schema/config-file.v1.json