Blank page after running build on create-react-app

Trying to deploy create-react-app on netlify, however my build is blank page. I'm using .env file for loading firebase api key is that a problem for build?

Even when I tried to open it locally on my computer its blank page and it outputs an error in console: "Loading failed for the

I solved the problem by setting

"homepage": "."

in package.json according to this doc

If you're using react-router and trying to open index.html directly in the browser (or using electron, which essentially does that), in addition to setting homepage as others have suggested, replace your BrowserRouter with a HashRouter.

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I was trying to build an electron app using create-react-app. When running in development everything was fine, but when I built the CRA and then pointed the electron app to the index.html file, I got the blank page.

I found that that was exactly the same as opening the index.html file directly in the browser. Everyone says "set homepage in package.json", but I already had that. So what now!?

I eventually figured out that the problem was react-router. I was using a BrowserRouter. Switching to a HashRouter solved the problem for me.

Add

"homepage": ".",

in your package.json then build again.

Just as @Verthon said putting the "homepage": ".", in your package.json file, in the top level like this:

{
     "name": "myApp",
     "homepage": ".",
     // all other package.json stuff...
}

Oooor as I just found out that I had done again and again: You published the public folder instead of the build folder.

I had a comment inside my return method and this caused the problem for me.

If the error message in the browser console is

> Minified React error #152;

Then removing any comment inside the return method might solve your problem as it did mine.

For me the issue was the inline runtime script was not being run as I was getting the error:

> Refused to execute inline script because it violates the following > Content Security Policy directive: "script-src 'self'". Either the > 'unsafe-inline' keyword, a hash ('sha256-5='), or a nonce > ('nonce-...') is required to enable inline execution.

This was fixed by adding the INLINE_RUNTIME_CHUNK=false variable to the build script.

"build": "INLINE_RUNTIME_CHUNK=false react-scripts build",

This is because of the Content Security Policy of browsers: "A CSP compatible browser will then only execute scripts loaded in source files received from those allowlisted domains, ignoring all other script (including inline scripts and event-handling HTML attributes)."

I faced similar issue. But if you follow React-Deployment, correctly, you will realise that there is a "homepage":"." // User "." if you are deploying on your local machine, but on a server hosted somewhere you can use your domain or ip address the homepage field.

{
  "homepage":"https://example.com"
}

simply change the private property value in your package.json to false

So the problem is with the caching of your app in the browser.

I have solved this problem with serviceWorker() in create-react-app.

Here is the solution: Just add this in you index.js file and remove service worker register

import { unregister } from './registerServiceWorker';
unregister();

I was trying to open the application after build with double-clicking the index.html and didn't work either, I got the blank page but if the built files are run in a server environment works. https://create-react-app.dev/docs/deployment/

1. Run npm run eject

2. Edit file webpack.config in the config folder

3. Find path with "static/" or "static/js/" or "static/css/" in the file and delete such path

4. Build your project again

This work for me. hope this works for you, too.