ghostbarik / super-simple-logger-typescript

Custom implementation of logger in pure TypeScript.

Super Simple TypeScript Logger

Custom implementation of logger in pure TypeScript.

Zero dependencies! - just copy logger.ts file into your project and use

Supported log levels: ERROR, WARN, INFO, DEBUG, TRACE

Usage

import createLogger from logger

// create logger for module 'MAIN' with level set to 'INFO', 
// i.e. only message with level = ERROR, WARN, INFO will be printed by the logger
const logger = createLogger('MAIN', LogLevel.INFO)

logger.error("error message")  // will be printed
logger.warn("warning message") // will be printed
logger.info("info message")    // will be printed
logger.debug("debug message")  // WILL NOT BE PRINTED
logger.trace("trace message")  // WILL NOT BE PRINTED

// output example
logger.info("message example")
==> '[level=INFO, module=MAIN, 2021-07-14T19:20:44.156Z]: message example'

Default Logger Output

By default logger outputs to console.log(..), but this can be overriden by providing alternative output sink in createLogger(..) function (check function description)

Logger Output Format

Output format template can be overriden for custom use (check the description for createLogger(..) function)

Asynchronous Logging

In case logger needs to write to some remote service (i.e. it needs to call asynchronous function), you can use asynchronous version of the logger factory function -> createAsyncLogger(..) (check function description for usage example).