Nuxtjs Guideline: Server — Use defineEventHandler for handlers. Description: Define server route handlers. Do: defineEventHandler for all handlers. Don't: export default function. Good Example: export default defineEventHandler((event) => { return { hello: 'world' } }). Bad Example: export default function(req, res) {}. Severity: High. Docs: https://nuxt.com/docs/guide/directory-structure/server.