nuxt/dist/app/components/dev-only.js

Nuxt is a free and open-source framework with an intuitive and extendable way to create type-safe, performant and production-grade full-stack web applications and websites with Vue.js.

import { defineComponent } from "vue";
export default defineComponent({
  name: "DevOnly",
  setup(_, props) {
    if (import.meta.dev) {
      return () => props.slots.default?.();
    }
    return () => props.slots.fallback?.();
  }
});