throwDebugger is useful for tapping into a stream to check details about an event

throwDebugger.js

// usage:
// .tap(event => throwDebugger(event))
// or
// function foo(event) {
//     throwDebugger(event);
//     // code that requires a closer look 
// }

const throwDebugger = function throwDebugger(event) {
    console.log('event is', event);
    debugger;
};