index.js

/**
 * This project showcases Logtail JavaScript integration for 
 * both backend and frontend code 
 * 
 * This code uses the @logtail/js package which can be used for both frontend and backend
 * 
 * For more infromation visit https://github.com/elliahu/Logtail-JavaScript
*/

// Require Logtail Class for backend code (Node.js)
const { Node: Logtail } = require("@logtail/js");

// In frontend code use the following:
// import { Browser as Logtail } from "@logtail/js";

// Create a logger from a Logtail class
const logger = new Logtail(process.argv[2]);

// Usage

// Send debug level log using the debug() method
logger.debug("I am using Logtail!");

// Send info level log using the info() method
logger.info("An interesting event occured!")

// Send warn level log using the warn() method
// You can add additional structured data to help you troubleshoot your code as shown below
logger.warn("Something is not quite right, better check on it.",{
    user:{
        username:"someuser",
        email:"someuser@example.com"
    },
    additional_info:{
        tried_accessing: "/url/of/error"
    }
});

// Send error level log using the error() method
logger.error("Oops! An runtime ERROR occurred!").then(
    // Logging methods are async function returning Promises
    // OnResolve write message
    function() {
        console.log("All done! You can check your logs now.")
    }
);