fix(nuxt): resolve internal target: blank links with base

packages/nuxt/src/app/components/nuxt-link.ts

@@ -1,12 +1,11 @@
 import type { ComputedRef, DefineComponent, InjectionKey, PropType } from 'vue'
 import { computed, defineComponent, h, inject, onBeforeUnmount, onMounted, provide, ref, resolveComponent } from 'vue'
 import type { RouteLocation, RouteLocationRaw } from '#vue-router'
-import { hasProtocol, parseQuery, parseURL, withTrailingSlash, withoutTrailingSlash } from 'ufo'
-
+import { hasProtocol, joinURL, parseQuery, parseURL, withLeadingSlash, withTrailingSlash, withoutTrailingSlash } from 'ufo'
 import { preloadRouteComponents } from '../composables/preload'
 import { onNuxtReady } from '../composables/ready'
 import { navigateTo, useRouter } from '../composables/router'
-import { useNuxtApp } from '../nuxt'
+import { useNuxtApp, useRuntimeConfig } from '../nuxt'
 import { cancelIdleCallback, requestIdleCallback } from '../compat/idle-callback'
 
 // @ts-expect-error virtual file
@@ -280,8 +279,15 @@ export function defineNuxtLink (options: NuxtLinkOptions) {
 
         // Resolves `to` value if it's a route location object
         // converts `""` to `null` to prevent the attribute from being added as empty (`href=""`)
-        const href = typeof to.value === 'object' ? router.resolve(to.value)?.href ?? null : to.value || null
+        let href = typeof to.value === 'object' ? router.resolve(to.value)?.href ?? null : to.value || null
 
+        // joins with `baseURL` if it's an relative link
+        if (import.meta.client && href && href.startsWith('/') && !href.startsWith('//')) {
+          const baseURL = useRuntimeConfig().app.baseURL
+          if (href !== '/' && !href.startsWith(baseURL)) {
+            href = joinURL(withLeadingSlash(withTrailingSlash(baseURL)), href)
+          }
+        }
         // Resolves `target` value
         const target = props.target || null