app.kluk.fr/app/javascript/controllers/choix_mode_controller.js

import { Controller } from "@hotwired/stimulus"

// Formulaire du journal : l'illustration suit le mode choisi.
export default class extends Controller {
  static targets = [ "carte", "image" ]

  changer(event) {
    const { image, couleur } = event.currentTarget.dataset
    this.imageTarget.src = image
    this.carteTarget.style.setProperty("--humeur", couleur)
  }
}