Why donate
API Explorer
Upgrade guide
The quasar.config file
Convert project to CLI with Vite
Browser Compatibility
Supporting TypeScript
Directory Structure
Commands List
CSS Preprocessors
Lazy Loading - Code Splitting
Handling Assets
Boot Files
Prefetch Feature
API Proxying
Handling Vite
Handling process.env
State Management with Pinia
State Management with Vuex
Testing & Auditing
Developing Mobile Apps
Ajax Requests
Opening Dev Server To Public
Quasar CLI with Vite - @quasar/app-vite
API Proxying for Dev

When integrating a project folder (created by Quasar CLI) with an existing backend, a common need is to access the backend API when using the dev server. To achieve this, we can run the dev server and the API backend side-by-side (or remotely), and let the dev server proxy all API requests to the actual backend.

This is useful if you access relative paths in your API requests. Obviously, these relative paths will probably not work while you are developing. In order to create an environment similar to the one used by your deployed website/app, you can proxy your API requests.

To configure the proxy rules, edit the /quasar.config file in devServer.proxy. Under the hood, it uses http-proxy. Full list of its options here.

/quasar.config file

devServer: {
  proxy: {
    // string shorthand
    '/foo': 'http://localhost:4567',
    // with options
    '/api': {
      target: 'http://jsonplaceholder.typicode.com',
      changeOrigin: true,
      rewrite: (path) => path.replace(/^\/api/, '')
    // with RegEx
    '^/fallback/.*': {
      target: 'http://jsonplaceholder.typicode.com',
      changeOrigin: true,
      rewrite: (path) => path.replace(/^\/fallback/, '')
    // Using the proxy instance
    '/api': {
      target: 'http://jsonplaceholder.typicode.com',
      changeOrigin: true,
      configure: (proxy, options) => {
        // proxy will be an instance of 'http-proxy'
    // Proxying websockets or socket.io
    '/socket.io': {
      target: 'ws://localhost:3000',
      ws: true