Logs a message at the MessageType.MessageError level, tagged with this logger's Logger.FullPath. Unlike LogService:Error(), this method emits an error-level log entry and returns normally; it does not throw. When a context table is provided, template placeholders like {key} in the message are replaced with the corresponding context values.

1
2
3
4
5

local LogService = game:GetService("LogService")
local logger = LogService:GetLogger("Network")

logger:Error("Request failed: {reason}", {reason = "timeout"})
-- Emits an error-level log; execution continues.

The full path of this logger, formed by joining the Logger.Name of each logger from the root down to this one with . separators. For a top-level logger the full path equals its name. Messages logged through this logger are tagged with this full path in LogService:GetLogHistory().

Returns the child logger with the given name, creating it if it does not already exist. Calling this with the same name repeatedly returns the same logger instance for as long as a reference to it is held. The returned logger's Logger.FullPath is this logger's full path followed by . and name.

This method raises an error if the name is empty, contains a ., or contains control characters, if the resulting full path is too long, or if the maximum number of live loggers has been exceeded.

1
2
3
4
5
6

local LogService = game:GetService("LogService")

local network = LogService:GetLogger("Network")
local http = network:GetLogger("Http")

print(http.FullPath)  --> Network.Http

Logs a message at the MessageType.MessageInfo level, tagged with this logger's Logger.FullPath. When a context table is provided, template placeholders like {key} in the message are replaced with the corresponding context values.

1
2
3
4
5

local LogService = game:GetService("LogService")
local logger = LogService:GetLogger("Combat")

logger:Info("Dealt {amount} damage", {amount = 42})
-- Output: "Dealt 42 damage"

Logs a message at the specified MessageType level, tagged with this logger's Logger.FullPath. This is a general-purpose method that combines Output(), Info(), Warn(), and Error() into a single call with an explicit message type parameter. Unlike LogService:Log(), passing MessageType.MessageError emits an error-level log and returns normally rather than throwing.

1
2
3
4

local LogService = game:GetService("LogService")
local logger = LogService:GetLogger("Combat")

logger:Log(Enum.MessageType.MessageInfo, "Event {action}", {action = "spawn"})

Fires whenever a message is logged through this logger or any logger beneath it in the hierarchy. Because a logged message fires MessageOut on the originating logger and each of its ancestors, a listener attached to a parent logger observes every message emitted by its descendants. The message parameter contains the fully rendered text (template placeholders already replaced), and the context parameter carries the structured key-value pairs when the message was logged with a context table; otherwise it is nil.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10

local LogService = game:GetService("LogService")
local combat = LogService:GetLogger("Combat")

combat.MessageOut:Connect(function(message, messageType, context)
	print("[Combat]", message)
end)

-- A message logged on a descendant also fires the parent's MessageOut.
combat:GetLogger("Damage"):Info("Hit for {amount}", {amount = 10})
-- Prints: [Combat] Hit for 10

The name of this logger as supplied to LogService:GetLogger() or Logger:GetLogger(). This is a single path segment and never contains a . character. Use Logger.FullPath for the complete dot-joined path.

Logs a message at the MessageType.MessageOutput level, tagged with this logger's Logger.FullPath. When a context table is provided, template placeholders like {key} in the message are replaced with the corresponding context values, and the context is preserved as structured data for display in the Developer Console and Studio's Output window.

1
2
3
4
5

local LogService = game:GetService("LogService")
local logger = LogService:GetLogger("Shop")

logger:Output("Player {name} opened the shop", {name = "Alice"})
-- Output: "Player Alice opened the shop"

Logs a message at the MessageType.MessageWarning level, tagged with this logger's Logger.FullPath. When a context table is provided, template placeholders like {key} in the message are replaced with the corresponding context values.

1
2
3
4
5

local LogService = game:GetService("LogService")
local logger = LogService:GetLogger("Combat")

logger:Warn("Health low: {hp}", {hp = 5})
-- Output: "Health low: 5"