Broke when add typescript code inside store file

[kleysonfiretail]

export function fulfilled(organisation, payload, { data }) { const x: number = 0; }

Error: `Module parse failed: Unexpected token (6:9) File was processed with these loaders:

• ./node_modules/@pmmmwh/react-refresh-webpack-plugin/loader/index.js
• ./node_modules/source-map-loader/dist/cjs.js You may need an additional loader to handle the result of these loaders.`