{ "presets": [ [ "@babel/preset-env", { "targets": { "browsers": "last 2 versions" }, "useBuiltIns": "usage", "corejs": 3 } ], [ "@babel/preset-typescript", { "onlyRemoveTypeImports": true } ], "@babel/preset-react" ], "plugins": [ [ "@babel/plugin-proposal-decorators", { "legacy": true } ], [ "@babel/plugin-proposal-class-properties", { "loose": true } ] ], "env": { "development": { "plugins": ["react-refresh/babel"] } } }