small-type-logger

A lightweight TypeScript logging utility with pluggable output writers.

Features

• Simple Logger class
• Pluggable output adapters (ConsoleOutput, HttpOutput, FileOutput)
• Fully typed
• No dependencies
• Works in Node, browsers, and serverless

Installation

npm install small-type-logger

Usage

Basic Example

import { Logger, Router, StdoutOutput, LineFormatter } from "small-type-logger";

const router = new router();
const logger = new Logger(router);
router.addRoute(new LineFormatter(), new StdoutOutput(), () => true);
logger.info("Hello world");

File Output (Node)

import { Logger, Router, FileOutput, JsonFormatter, Log, LogLevel } from "small-type-logger";

const router = new router();
const logger = new Logger(router);
router.addRoute(new JsonFormatter(), new FileOutput('/var/log/app.log'), (log: Log) => log.level == LogLevel.DEBUG || log.level == LogLevel.NOTICE || log.level == LogLevel.WARNING);
router.addRoute(new JsonFormatter(), new FileOutput('/var/log/app.err.log'), (log: Log) => log.level == LogLevel.ERROR || log.level == LogLevel.CRITICAL);
logger.error("An error occurred!");

HTTP Output

import { Logger, Router, HttpOuput, JsonFormatter, Log, LogLevel } from "small-type-logger";

const router = new router();
const logger = new Logger(router);
router.addRoute(new JsonFormatter(), new FileOutput('https://logstash.acme.com:8080'), (log: Log) => true);
logger.warn("Something happened");

Loki Output

import { Logger, LokiOutput } from "small-type-logger";

import { Logger, Router, LokiOutput, LineFormatter, Log, LogLevel } from "small-type-logger";

const router = new router();
const logger = new Logger(router);
router.addRoute(new LineFormatter(), new LokiOuput({'https://victorialogs.acme.com:8080/api/v1/push', labels: {
  job: "testJob",
  host: "my-host"
}), (log: Log) => true)
logger.warn("Something happened");

License

MIT — see LICENSE.txt