fix(dev): prepend baseURL for vite hmr ws upgrade (#370)

src/utils/dev.ts

@@ -5,6 +5,7 @@ import chokidar from 'chokidar'
 import { consola } from 'consola'
 import { debounce } from 'perfect-debounce'
 import { toNodeListener } from 'h3'
+import { joinURL } from 'ufo'
 import {
  HTTPSOptions,
  ListenURL,
@@ -244,14 +245,16 @@ class NuxtDevServer extends EventEmitter {
  this.listener.server.on(
  'upgrade',
  async (req: any, socket: any, head: any) => {
- if (
- req.url.startsWith(
- this._currentNuxt?.options.app.buildAssetsDir /* /_nuxt/ */,
- )
- ) {
+ const nuxt = this._currentNuxt
+ if (!nuxt) return
+ const viteHmrPath = joinURL(
+ nuxt.options.app.baseURL,
+ nuxt.options.app.buildAssetsDir,
+ )
+ if (req.url.startsWith(viteHmrPath)) {
  return // Skip for Vite HMR
  }
- await this._currentNuxt?.server.upgrade(req, socket, head)
+ await nuxt.server.upgrade(req, socket, head)
  },
  )
  }