nuxt/dist/pages/runtime/validate.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 { createError } from "#app/composables/error";
import { defineNuxtRouteMiddleware } from "#app/composables/router";
export default defineNuxtRouteMiddleware(async (to, from) => {
  if (!to.meta?.validate) {
    return;
  }
  const result = await Promise.resolve(to.meta.validate(to));
  if (result === true) {
    return;
  }
  const error = createError({
    fatal: import.meta.client,
    statusCode: result && result.statusCode || 404,
    statusMessage: result && result.statusMessage || `Page Not Found: ${to.fullPath}`,
    data: {
      path: to.fullPath
    }
  });
  if (typeof window !== "undefined") {
    window.history.pushState({}, "", from.fullPath);
  }
  return error;
});