Linking Api's openURL with schema tel error in iPad - ipad

Question

I am using the following code...
openPhoneDialler(mobile) {
let url = 'tel:' + mobile;
Linking.canOpenURL(url).then(supported => {
if (!supported) {
throw 'Cant open phone dialler';
} else {
return Linking.openURL(url);
}
}).catch(err =>
Alert.alert('Error','Error occurred',[{text: 'OK', onPress: () => {}}])
);
}
I am testing on an iPad without SIM card feature (Wifi only) , the canOpenURL gets resolved and the Linking.openURL(url) is called which shows an Alert with the mobile number and two options 'Cancel' and 'Call'. When I press 'Call' the alert gets closed and nothing happens which is expected since it is Wifi only iPad.
But when I press 'Cancel' the app crashes with the following error screen
JSON value '{
code = EUNSPECIFIED;
domain = RCTErrorDomain;
framesToPop = 1;
nativeStackIOS = (
"0 workforce_mobile 0x00000001000d4d00 RCTJSErrorFromCodeMessageAndNSError + 152",
"1 workforce_mobile 0x0000000100053e4c __41-[RCTModuleMethod processMethodSignature]_block_invoke_2.224 + 192",
"2 workforce_mobile 0x000000010015e2f0 -[RCTLinkingManager openURL:resolve:reject:] + 352",
"3 CoreFoundation 0x000000018164ce80 <redacted> + 144",
"4 CoreFoundation 0x00000001815422b4 <redacted> + 292",
"5 CoreFoundation 0x0000000181546e7c <redacted> + 60",
"6 workforce_mobile 0x0000000100055098 -[RCTModuleMethod invokeWithBridge:module:arguments:] + 1704",
"7 workforce_mobile 0x00000001000aea54 -[RCTBatchedBridge callNativeModule:method:params:] + 568",
"8 workforce_mobile 0x00000001000addf4 __33-[RCTBatchedBridge handleBuffer:]_block_invoke.477 + 1276",
"9 libdispatch.dylib 0x00000001804fe9e0 <redacted> + 24",
"10 libdispatch.dylib 0x00000001804fe9a0 <redacted> + 16",
"11 libdispatch.dylib 0x000000018050cad4 <redacted> + 928",
"12 libdispatch.dylib 0x00000001805022cc <redacted> + 884",
"13 libdispatch.dylib 0x000000018050ea50 <redacted> + 540",
"14 libdispatch.dylib 0x000000018050e7d0 <redacted> + 124",
"15 libsystem_pthread.dylib 0x00000001807071d0 _pthread_wqthread + 1096",
"16 libsystem_pthread.dylib 0x0000000180706d7c start_wqthread + 4"
);
userInfo = "<null>";
}' of type NSDictionary cannot be converted to NSString
Note: the same crash also happens when u leave the alert open for around 10 seconds without any press.
Tested on : iPad (Wifi only and physical device) OS version 10.3.1
Is this a bug in React-Native Linking Api or with the above code.

Answer 1

Linking.openUrl returns a promise object. By pressing the Cancel button, you cause the promise to be rejected. Just add a catch to swallow the rejected promise.
Linking.openUrl().catch(() => null)
Here's the documentation about that:
https://facebook.github.io/react-native/docs/linking.html#openurl