warn
console.warn
Emit a log message to the main logging system, sent to us by the JS console intrinsic; log message output is moderated via standard logging system mechanisms (i.e. on the JVM, this is SLF4J). The console.warn method corresponds to the WARN level.
All args are converted to a string value before emission; all values are joined by the string " ".
Parameters
args
Arguments to emit as part of this log message.