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  • #12304
Closed
Open
Issue created Apr 18, 2022 by Administrator@rootContributor

Invalid options object. Dev Server has been initialized using an options object that does not match the API schema.

Created by: slim-hmidi

Describe the bug

I'm trying to access the Apis in my local server throug the react app and I got this issue:

Invalid options object. Dev Server has been initialized using an options object that does not match the API schema.
 - options.allowedHosts[0] should be a non-empty string.

Did you try recovering your dependencies?

8.3.1

Which terms did you search for in User Guide?

proxy in local environment

Environment

 System:
    OS: Windows 10 10.0.19044
    CPU: (12) x64 Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
  Binaries:
    Node: 16.14.0 - C:\Program Files\nodejs\node.EXE
    Yarn: Not Found
    npm: 8.3.1 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Chrome: Not Found
    Edge: Spartan (44.19041.1266.0), Chromium (100.0.1185.44)
    Internet Explorer: 11.0.19041.1566
  npmPackages:
    react: ^17.0.2 => 17.0.2
    react-dom: ^17.0.2 => 17.0.2
    react-scripts: 5.0.0 => 5.0.0
  npmGlobalPackages:
    create-react-app: Not Found

Steps to reproduce

(Write your steps here:)

  1. Install http-proxy-middleware
  2. Create setupProxy and add this code:
const { createProxyMiddleware } = require('http-proxy-middleware');

module.exports = function(app) {
  app.use(
    '/',
    createProxyMiddleware({
      target: 'http://localhost:5000',
      changeOrigin: true,
    })
  );
};
  1. npm start

Expected behavior

The app should be started normally.

Actual behavior

I got this error:

Invalid options object. Dev Server has been initialized using an options object that does not match the API schema.
 - options.allowedHosts[0] should be a non-empty string.
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