azure-iot-samples-node | samples provides a set of easy-to-understand | Azure library

I'm new to Node.js and react-native. I followed the sample on send_telemetry.js exactly but when I run my react-native app I get an error: "The development server returned response error code 500.

the error message is:

bundling failed: Error: Unable to resolve module fs from ProjectPath\node_modules\azure-iot-device\lib\module_client.js: Module fs does not exist in the Haste module map";

Im running:

• Node.js v10.15.3
• NPM 6.4.1
• react-native@0.59.2

First error was the same with Unable to resolve module events, I can install events, but the fs module is: "This package name is not currently in use, but was formerly occupied by another package. To avoid malicious use, npm is hanging on to the package name, but loosely, and we'll probably give it to you if you want it."