React Native Debug JS Remotely Error window.deltaUrlToBlobUrl is not a function

I am trying to to debug the react native app, If I don't try to debug JS remotely then everything is fine, but when I try to debug JS remotely I do get this error.

I had this error too. The reason for me was the opened debugger tab in chrome from previous session. So when I closed it everything works fine now :)

try to change your URL of Chrome from http://localhost:8081/debugger-ui/ to http://192.168.XXXX.XXXX.xip.io:8081/debugger-ui/

source: https://github.com/facebook/react-native/issues/17618

I had same error, I just closed the browser and refreshed my simulator. It may open the browser window again with debugging window. But it takes care of the error. If not I suggest terminating your simulator and running the build commands again.

This can be solved by restarting JS debugging and closing existing debugger.

• Close Chrome debugger session

On iOS, do:

• CMD + CTRL + Z
• Press Stop Remote JS Debugging
• CMD + CTRL + Z Again
• enable Remote JS Debugging

Almost the same on Android, but the difference is the keyboard command it is CMD + M on Mac or CTRL+M on Windows devices.

Close emulator.

Close node console which get opened after executing command react-native run-android.

Start emulator again.

Run project again.

Hope this help.

i just cleared my browser cache and my app cache and its working now this error appears when you have

I installed chrome CORS extension and enabled the CORS then it worked, Even If I open chrome with disable security manually then also it didn't worked for me until I install the extension.

Aha! Found a better, less hacky solution. It seems when I upgraded Expo client on windows, it changed my default 'host'. Click the cog and change 'host' to 'LAN' to avoid CORS