Am I using env and browserlist correctly?

[rostero1]

The following keeps my classes as classes:

from package.json

  "browserslist": {
    "production": [
      "chrome > 90"
    ],
    "development": [
      "chrome > 90"
    ]
  },

from .swcrc

  "env": {
    "targets": {
      "chrome": "90",
    }
  }

Using coreJs (with package.json left the same) converts my classes to functions (ES6):

from .swcrc

  "env": {
    "mode": "usage",
    "coreJs": 3
  }