babel.config.ember.json

{
  "plugins": [
    [
      "@babel/plugin-transform-typescript",
      { "allExtensions": true, "allowDeclareFields": true }
    ],
    "@embroider/addon-dev/template-colocation-plugin",
    [
      "babel-plugin-ember-template-compilation",
      {
        "targetFormat": "hbs",
        "transforms": []
      }
    ],
    ["@babel/plugin-proposal-decorators", { "version": "legacy" }],
    ["@babel/plugin-transform-class-properties", { "loose": true }]
  ]
}