rf-logger

A simple logging utility with a save function.

Setup

The first parameter takes a name or a label that will prefix the log. Usually it's best to just use the name of whatever script is running the logger. If you want to save, the logs to a file, use

{ save: true }.

It will default save to:

./logs.log.

Otherwise, you can specify the path in options:

const logger = new Logger({ filename: "myscript.js", save: false, path: "./logs.log" });

It will save with timestamps in CSV format.

Timestamp format: YYMMDD HH:mm:ss.ms

If you want to import it to a spreadsheet, just change the extension .log to .csv.

Custom Log Name

You can add a custom log name by adding it to settings.

const logger = new Logger({ filename: "myscript.js", customLog: "fatality"});
 
logger.custom("this might be bad")
// (myscript.js) FATALITY this might be bad

Example

const Logger = require("./index.js");
const logger = new Logger({ filename: "myscript.js", save: false, path: "./logs.log", customLog: "fatality" });
 
logger.log("hello world")
// (myscript.js) hello world 
 
logger.info("hello info")
// (myscript.js) <INFO> hello info
 
logger.warn("hello warning")
// (myscript.js) <WARN> hello warning
 
logger.error("hello error")
// (myscript.js) <ERROR> hello error
 
logger.debug("hello debug")
// (myscript.js) <DEBUG> hello debug
 
logger.custom("hello custom")
// (myscript.js) <FATALITY> hello custom

Saved Output

200803 00:16:54.436, "myscript.js", log, "hello world"
200803 00:16:54.436, "myscript.js", info, "hello info"
200803 00:16:54.436, "myscript.js", error, "hello error"
200803 00:16:54.436, "myscript.js", warn, "hello warning"
200803 00:16:54.436, "myscript.js", fatality, "hello custom"