create-react-app - Why localhost is not working?

Question

After creating a new react app using create-react-app, once I start the dev server via npm start, the server started and shows this:

I'm sure that until last week I could open http://localhost:3000 to see the new created app in browser, but now it doesn't work any more and shows this:

But, it works if I open http://192.168.119:3000

I haven't changed anything inside my .hosts file.

Does any one know why I cannot use http://localhost:3000 any more?

Yes, as I mentioned nothing is changed inside the .hosts file. — user1941537, May 01 '19 at 05:16
Are you sure you're it's http:// and not http**s**:// you're trying to open? See e.g. https://stackoverflow.com/questions/40430501/127-0-0-1-this-site-can-t-provide-a-secure-connection — JJJ, May 01 '19 at 05:17

score 5 · Answer 1 · answered May 01 '19 at 05:36

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Thanks for your help guys. After emptying the browser cache and flushing the DNS it's now working again.

answered May 01 '19 at 05:36

user1941537

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score 3 · Answer 2 · answered Aug 03 '21 at 11:46

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I had a similar problem, and checked that my VPN ( I use warp) is turned off already. However, when I turned it on, my local worked again.

answered Aug 03 '21 at 11:46

M.Yavuz YAĞIŞ

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The exact same thing worked for me. Any idea why you need to turn on Warp? Doesn't make any sense. – random_coder_101 Sep 01 '21 at 13:55
I did not delve into it to be honest. But after VPN-on launch, even after turning the VPN off did not create any sort of blockage. – M.Yavuz YAĞIŞ Sep 04 '21 at 12:09

score 1 · Answer 3 · answered May 01 '19 at 05:30

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Have you used an agent?

ping localhost, check it is 127.0.0.1?

answered May 01 '19 at 05:30

SIMDD

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score 0 · Answer 4 · answered Jun 27 '20 at 22:21

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Little late to this, but i came across the same issue; Turned out my vpn app was running preventing me from accessing the app on http://localhost:3000. So, turning off the vpn should resolve the issue

answered Jun 27 '20 at 22:21

enncheema

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create-react-app - Why localhost is not working?

4 Answers4