{ "babelrc": false, // Note: order is bottom-to-top and/or right-to-left "presets": [ [ "@babel/preset-env", { "bugfixes": true, "browserslistEnv": "dev", "useBuiltIns": "entry", "corejs": "3.10" } ], [ "@babel/preset-typescript", { "allowNamespaces": true, "allowDeclareFields": true } ], [ "@babel/preset-react", { "runtime": "automatic" } ] ], "plugins": [ [ "@babel/plugin-transform-typescript", { "allowNamespaces": true, "allowDeclareFields": true } ], ["@babel/plugin-proposal-object-rest-spread", { "loose": true }], "@babel/plugin-transform-react-constant-elements", "@babel/plugin-proposal-nullish-coalescing-operator", "@babel/plugin-proposal-optional-chaining", "@babel/plugin-syntax-dynamic-import", // needed for `() => import()` in routes.ts "angularjs-annotate", "macros" ], "env": { "production": { "presets": [ [ "@babel/preset-env", { "browserslistEnv": "production" } ] ] }, "hot": { "plugins": ["react-refresh/babel"] } } }