Log

The @std/log module provides simple leveled logging.

import log from "@std/log"

log.info("server started")

Log Levels

The supported levels are:

Level	Priority
DEBUG	0
INFO	1
WARN	2
ERROR	3

The default level is INFO.

Messages below the current level are ignored.

Exports

Name	Description
debug(...)	Writes a debug message.
info(...)	Writes an info message.
warn(...)	Writes a warning message.
error(...)	Writes an error message.
setLevel(level)	Sets the current log level.

Logging Messages

import log from "@std/log"

log.debug("debug value:", 123)
log.info("user logged in")
log.warn("missing optional config")
log.error("request failed")

warn and error write to standard error. debug and info write to standard output.

log.setLevel

Sets the minimum level to print.

import log from "@std/log"

log.setLevel("DEBUG")

log.debug("now debug logs are visible")

The level is case-insensitive internally because it is normalized to uppercase.

import log from "@std/log"

log.setLevel("warn")

log.info("hidden")
log.warn("visible")