Simple JS Logger that logs to a TXT file.

logger.js

const fs = require('fs');
const path = require('path');

const DEFAULT_PATH = './output/log.txt';

const getAbsolutePath = (filePath) => {
  const absolutePath = path.resolve(filePath);
  const fileExists = fs.existsSync(absolutePath);
  if (!fileExists) {
    throw new Error(`File doesn't exist: ${absolutePath}`);
  }
  return absolutePath;
}
const getMessage = (data) => {
  if (!data) return '';
  const isString = (typeof data === 'string');  
  const text = (isString) ? data : JSON.stringify(data, null, 2);
  const message = `\n${text}`;
  return message;
};
const log = (data, filePath) => {
  try {
    const path = getAbsolutePath(filePath || DEFAULT_PATH);
    const message = getMessage(data);
    fs.appendFileSync(path, message);
  } catch (e) {
    console.error(e);
  }
};
export default log;