Logs values, errors and completion to the console, and passes them all along unchanged.
of(1, 2).pipe(logValues()).subscribe(); // prints using console.log: // [value] 1 // [value] 2 // [complete]
of(1, 2).pipe(logValues("my number", "debug")).subscribe(); // prints using console.debug: // [value] my number 1 // [value] my number 2 // [complete] my number
throwError("boo").pipe(logValues("pipe says", "warn")).subscribe(); // prints using console.warn: // [error] pipe says boo
Logs values, errors and completion to the console, and passes them all along unchanged.