{ "presets": [ [ "@babel/preset-env", { "corejs": 3, "useBuiltIns": "usage" } ], ["@babel/preset-react", { "runtime": "automatic" }], ["@babel/preset-typescript", { "allowNamespaces": true }] ], "plugins": [ ["@babel/plugin-proposal-decorators", { "legacy": true }], "babel-plugin-styled-components" ], "assumptions": { "setPublicClassFields": false } }