create-react-app doesn't work

[shoNagai]

Describe the bug

create-react-app doesn't work, after running yarn start, the browser starts up but the page doesn't appear.

Did you try recovering your dependencies?

I tried uninstalling the specified version in nodenv and then reinstalling it, but the problem persists.

Which terms did you search for in User Guide?

npm start not work

Environment

 current version of create-react-app: 3.4.1
  running from /Users/nagaishou/.nodenv/versions/12.18.0/lib/node_modules/create-react-app

  System:
    OS: macOS 10.15.6
    CPU: (4) x64 Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz
  Binaries:
    Node: 12.18.0 - ~/.nodenv/versions/12.18.0/bin/node
    Yarn: 1.7.0 - /usr/local/bin/yarn
    npm: 6.14.4 - ~/.nodenv/versions/12.18.0/bin/npm
  Browsers:
    Chrome: 84.0.4147.125
    Firefox: 72.0.2
    Safari: 13.1.2
  npmPackages:
    react: ^16.13.1 => 16.13.1
    react-dom: ^16.13.1 => 16.13.1
    react-scripts: 3.4.3 => 3.4.3
  npmGlobalPackages:
    create-react-app: 3.4.1

Steps to reproduce

1.create-react-app client-app --template typescript
2.cd client-app
3.yarn start

Expected behavior

show welcome to react.

Actual behavior

No errors in the console.

The browser opens, but the page does not appear.

Reproducible demo

https://github.com/shoNagai/start-create-react-app

[HemanthDavuluri]

https://github.com/facebook/create-react-app/issues/5392
or this one
https://stackoverflow.com/questions/59271634/react-npm-start-windows-cannot-find-localhost

[shoNagai]

@HemanthDavuluri Thank you very much.
Referring to https://github.com/facebook/create-react-app/issues/5392, I was able to get it to work by changing the port.
I didn't specifically use the 3000 port, so I don't know the root cause of the problem, but it helped for now.

[HemanthDavuluri]

@shoNagai nice
close the issue as it is solved

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