@taharactrl/simple-logger v1.3.2

simple-logger

Installation

npm install --save @taharactrl/simple-logger

Usage

const logger = require("@taharactrl/simple-logger").createLogger("debug");

logger.fatal("fatal log");
// => [2021-10-13T04:40:04.984+00:00][FATAL][simple-logger] fatal log
logger.error("error log");
// => [2021-10-13T04:40:04.989+00:00][ERROR][simple-logger] error log
logger.warn("warn log");
// => [2021-10-13T04:40:04.990+00:00][WARN][simple-logger] warn log
logger.info("info log");
// => [2021-10-13T04:40:04.990+00:00][INFO][simple-logger] info log
logger.debug("debug log");
// => [2021-10-13T04:40:04.990+00:00][DEBUG][simple-logger] debug log
logger.trace("trace log");
// => null      trace log is not output since logLevel = 'debug'
logger.mark("mark log");
// => [2021-10-13T04:40:04.990+00:00][MARK][simple-logger] mark log

Options

createLogger(logLevel, logTag, timezone, filepath, format)

• logLevel : default error. You can choose this parameter from fatal | error | warn | info | debug | trace

• logTag : default simple-logger. This parameter is used in log format.

[2021-10-13T04:40:04.990+00:00][MARK][${logTag}] mark log

• timezone : default UTC. This parameter is used in log format timezone.

const logger = require("@taharactrl/simple-logger").createLogger(
  "debug",
  "simple-logger",
  "Asia/Tokyo"
);

logger.error("error log");
// => [2021-10-13T04:40:04.989+09:00][ERROR][simple-logger] error log

• filepath: default null. If this parameter is set, logs are output into filepath file.

const path = require("path");
const logger = require("@taharactrl/simple-logger").createLogger(
  "debug",
  "simple-logger",
  "Asia/Tokyo",
  [path.join(__dirname, "sample1.log"), path.join(__dirname, "sample2.log")]
);

logger.mark("mark log");

• format: default text. If this parameter is json, output logs are json format.

const logger = require("./index").createLogger(
  "debug",
  "simple-logger",
  "UTC",
  null,
  "json"
);

logger.mark({ msg: "mark log" });

/*
{
    "timestamp": "2021-11-11T09:53:43.063+00:00",
    "logLevel": "MARK",
    "logTag": "simple-logger",
    "logMessages": [
        {
            "msg": "mark log"
        }
    ]
}
 */