dlogger

A simple logger for Deno

Basic usage

import { Logger } from "https://deno.land/x/dlogger/mod.ts"

const logger = new Logger({ format: "Logger: %s\n" })

logger.log("test")
logger.info("test")
logger.warn("test")
logger.error("test")

function myFunc (x: number) { return x * 2 }

logger.log("Strings", "One", "Two", "Three")
logger.log("Functions", (x: number) => x * 2, myFunc)
logger.info("Object", { x: 24, y: 92 })
logger.warn("Array", [ 242, "abc", { a: 1, b: 3 } ])
logger.error("Error", new Error("Something has gone wrong"))

This will output

Note that only logger.error() will output the error message and it only takes one argument of the type Error.

Custom format

This is using printf from the deno standard library and you can use your own custom format. The default format is "%s\n".

import { Logger } from "./logger.ts"

// You can also change the default format when creating the logger
const logger = new Logger({ format: "\nLogger:\n%s\n\n" })

logger.log("Hello", 123, 321)

// Or in runtime
logger.format = "I'm using a custom %s!\n"
logger.log("format")

This will result in