a simple nodejs module for logging, provide many feature by default yet its coustomizable.

Available Features

• Can log to FILE or CONSOLE.
• Can print log name, date.
• Can print lineNo, fileName and functionName for where the log method was called.
• You can pass just string or object or any number of argument to log method.
• All the object passed to log method will be stringify and will be prefix with Object{index}
• If the object passed to error method is instance of error, then method will automatically print trace of that error, showing where the actuall error happend.
• Will emit event "LogConfigError" if any error occured like wrong options or file read error etc, we can attach the event listener after importing the module

line number where log was called is different from line number where error object got instantianted. i.e

line1: var userError = new Error('user name is Invalid'); //line1 is where error got created
line2: logger.error(userError);     //line2 is where the one of the logger method was called

How to install

npm install logat

Basic Usages

let logger = require('logat')
logger.error('this is error');
logger.warn('this is warn');
logger.info('this is info');
logger.debug('this is debug');

Available Options with default value

options ={
    logLevel: 1-error, 2-warn, 3-info, 4-debug(default)
    logMethod: 1-Console(default), 2-File
    logFileName: 'app.log'(default)
}

Deatail Usages(example)

'use strict'
let logger = require('logat');

logger.on('LogConfigError', err => console.log(err) );

logger.setOptions({
    logLevel: 4,
    logMethod: 1
})

function getAge(age) {
    logger.debug('Inside Student function');
    if (age < 18) {
        throw new Error('age must be above 18')
    } else {
        logger.info('returned age: ', age);
    }
}

try {
    getAge(15);
} catch (e) {
    logger.error(e);
}

Deatail Usages(output of above example)