website/wp-content/plugins/facetwp/package.json

{
  "name": "facetwp",
  "devDependencies": {
    "@rollup/plugin-buble": "^0.21.3",
    "@rollup/plugin-multi-entry": "^4.0.0",
    "rollup": "^2.26.10",
    "rollup-plugin-terser": "^7.0.1"
  },
  "scripts": {
    "build": "rollup -c",
    "watch": "rollup -c -w"
  }
}