The ulog logging framework is used to handle logs. It is a highly configurable and extendable logger.

Persist log record on Typo3 server is not implemented yet.

Loggers available:

  • FEditing:Component:LoadingScreen
  • FEditing:Component:Widget:Modal
  • FEditing:Component:Widget:Notification
  • FEditing:CRUD
  • FEditing:Editor
  • FEditing:FrontendEditing
  • FEditing:GUI
  • FEditing:localStorage
  • FEditing:Utils:Scroller
  • FEditing:Utils:TranslatorFactory
  • FEditing:Utils:TranslatorLoader

Log Levels

Following log levels exists:

  • error : Used if an exception occured and the normal handling failed.
  • warn: Also used if an exception occured, but the normal handling can be done.
  • info: Used if an state change occured like an event (eg. mouse click)
  • log: Used if an point of interesse is reached like the an array to loop.
  • debug: Used if an calculation happend.
  • trace (Not implemented yet): Used if an function get called and end. Only useful to record the call chains.

There are some special log levels only used to configure ulog:

  • none: No logs get selected
  • all: Normaly it is like trace. But if ulog log levels get extended it is much more save to use all.

Hint: The log level during log selection in configuration are chained. Use warn log level does indirectly also select error logs.


Configuration can be done as URL parameter or/and as localStorage item. There are follwing configuration options:

  • log: The main setting to control logger’s levels with
  • log_output: To configure the output of the output channel, where logging should go
  • log_drain: To configure the output of the drain channel

More details can be found at:


<config_option> = <config> [; <config>] … Configuration options can have more than one configuration entry:

<config> := [ <filter> = ] <value> Configuration entry have a value and a filter to select the loggers to apply the config: Hint: If no filter or a wildcard is set, the config is used as default config.

<filter> := <RegEx> [ , [ - ] <RegEx> ] … The filter is a list of RegEx with option to add or substract loggers from the selection set:


  • in log the <value> is a log level
  • in log_<channel_name> the <value> is one or more output


With URL parameters:

  • to log in general info level: ?log=info (Technically, this is equals to: ?log=*=info.)
  • To log widgets in debug and the rest in info mode: ?log=info;FEditing:Component:Widget:*=debug
  • To print and persist log in output channel: ?log_ouput=console persist
  • To print logs in general and persist logs from widgets in output channel: ?log_ouput=console;FEditing:Component:Widget:*=console persist
  • To print logs in general and only persist logs from widgets in output channel: ?log_ouput=console;FEditing:Component:Widget:*=persist


By default there are two outputs:

  • console: default browser console
  • noop: No operation function, used to prevent log in drain channel


By default there are two channels:

  • output: Used if log configuration is matching. eg. log=info and logRecord.level is smaller than info.
  • drain: Opposite to output channel. Used to have the opportunity to handle this log records to like persist in indexedDB.


There are two extensions as AMD available to use:

  • TYPO3/CMS/FrontendEditing/Utils/LoggerPersist Add two output Persist, Server and a new channel highorder
  • TYPO3/CMS/FrontendEditing/Utils/LoggerWindowError Register window error handlers to log them with a logger.

highorder channel

There are two new configuration options:

  • highorder_log: The main setting to control highorder channel selection. Hint: Analog to the log option and the output channel
  • log_highorder: To configure the output of the highorder channel, where logging should go