How to configure node conditional exports?

[laberning]

Hello,

I'm currently trying to set up a dev environment for web components with Lit. According to the Lit documentation I have to configure a node conditional export so that an unminified development version is used for easier debugging.

I tried to set the internal Rollup configuration as described in the Snowpack documentation, but I always end up with the production version of the library. What am I missing?

The relevant part of my snowpack.config.js looks like this:

import { nodeResolve } from '@rollup/plugin-node-resolve'

export default {
  mount: {
    './app/client': { url: '/' }
  },
  plugins: ['@snowpack/plugin-babel'],
  packageOptions: {
    rollup: {
      plugins: [
        nodeResolve({
          exportConditions: ['development'],
          dedupe: true
        })
      ]
    }
  },
  devOptions: {
    open: 'none',
    output: 'stream'
  },
  buildOptions: {
    out: 'build'
  }
}