window["optimizely"].push(log);

Parameter and Type	Child Attribute	Description
log LogObject	N/A	An object with the `type` field set to `log`. Required.
type string	Child attribute of type LogObject	The argument indicating that you're using the log function. Required.
level string	Child attribute of type LogObject	One of the following: OFF: No logs ERROR: Errors only WARN: Warning and above INFO: Info and above DEBUG: Debug and above

window["optimizely"].push({
  "type": "log",
  "level": "INFO"
});

Tell Optimizely Web Experimentation to output its log to the browser's console log (default is OFF).

You can also do this by using the query parameter optimizely_log={level}.

If you set the level to the currently configured log level, this function has no effect other than generating a warning.