Unmet peer dependency insert-css@^0.2.0

Hi @yoshuawuyts!

npm install sheetify

gives

+-- UNMET PEER DEPENDENCY insert-css@^0.2.0
`-- sheetify@5.0.0
  +-- falafel@1.2.0
  | `-- isarray@0.0.1
  `-- through2@2.0.1
    `-- readable-stream@2.0.6
      `-- isarray@1.0.0

That would not be bad but running browserify gives Cannot find module 'insert-css' from 'C:\Users\dmitry\Dropbox\Projects\gl-spectrum'.

Why inner-css dependency is considered peer, when it is critical to run sheetify?

[yoshuawuyts]

The issue at hand here is that by using sheetify, insert-css will be required by your application. E.g. after running the transform your code turns from this:

const sf = require('sheetify')
sf`.foo { color: blue; }`

to:

const sf = 0
require('insert-css')('.foo { color: blue; }')

Because dependencies are recursively resolved upwards from the current project directory, a dependency of insert-css in the sheetify directory will not be found - unless in the case of npm@3 with flat dependencies, but given that not everyone runst that, it cannot be relied upon.

Perhaps this reasoning should be added to the documentation; but as it stands now I don’t see another way of guaranteeing sheetify to work other than relying on peer dependencies.

[kvnneff]

I just ran into this myself. Here’s how someone else is getting their peerDependencies working in both npm2 and npm3: https://codingwithspike.wordpress.com/2016/01/21/dealing-with-the-deprecation-of-peerdependencies-in-npm-3/