How can I install package not used durring runtime?

[reggi]

I created a small prettier config here:

https://jsr.io/@reggi/prettier-config

with three deps

https://jsr.io/@reggi/prettier-config/1.0.1/deno.json#L6

similar to most config modules this exports an object but also loads in the bin for prettier and a plugin which are lost in translation when looking at the npx jsr package.json

{
  "name": "@jsr/reggi__prettier-config",
  "version": "1.0.1",
  "homepage": "https://jsr.io/@reggi/prettier-config",
  "type": "module",
  "dependencies": {
    "@github/prettier-config": "^0.0.6"
  },
  "exports": {
    ".": {
      "types": "./_dist/index.d.ts",
      "default": "./index.js"
    }
  },
  "_jsr_revision": 11
}

I believe this is because jsr doesn't look at import map for deps and looks at runtime deps.

how would you solve for this edge case where you'd expect these other two packages to downloaded?

ideally not

import "npm:prettier@^3.3.3"
import "npm:@trivago/prettier-plugin-sort-imports@^4.3.0"

however that might work it's a silly pref hit

[lucacasonato]

You could do if (false) import("...").

I am trying to understand more about the usecase though. Why do you need to install prettier and this config, but not rely on it. I feel like you are relying on node modules hoisting, which would break in pnpm for example.