Failed to execute 'send' on 'XMLHttpRequest', React Native Debugger

{
    "react": "16.0.0-alpha.6",
    "react-native": "^0.44.0",
    "realm": "^1.3.1",
     ...
}

When i debugger on Android，I’ve this error. But debugger on iOS Simulator. It’s working.

Please hope

[airguide]

This may sound dumb but it worked for me: You have to make sure you’re on the same network on the real device and the computer

[xotahal]

It seems they just switched from localhost to actual ip address. See https://github.com/facebook/react-native/pull/17720/files

Just temporary solution!

So I’ve changed: https://github.com/realm/realm-js/blob/master/react-native/ios/RealmReact/RealmReact.mm#L124 Instead of:

#if TARGET_IPHONE_SIMULATOR
    NSArray *hosts = @[@"localhost"];
#else
    NSArray *hosts = [self getIPAddresses];
#endif

I used this:

NSArray *hosts = [self getIPAddresses];

And in here: https://github.com/realm/realm-js/blob/master/react-native/ios/RealmReact/RealmReact.mm#L250 Instead of this:

[response setValue:@"http://localhost:8081" forAdditionalHeader:@"Access-Control-Allow-Origin"];

I used this:

[response setValue:@"http://192.168.x.x:8081" forAdditionalHeader:@"Access-Control-Allow-Origin"];