Get notified of Express JS errors with NotifyLog.

Nodejs' Express framework is a powerful tool for building web applications, but sometimes errors can occur and it's important to handle them properly in order to ensure a smooth user experience. That's where NotifyLog comes in.

With NotifyLog, you can create an error middleware that will capture any errors generated by your Express app and send them to your desired notification channels, such as Slack or Telegram. This way, you'll be able to stay on top of any issues and fix them as soon as possible.

Here's how to create an error middleware with NotifyLog:

1. First, install the NotifyLog module using npm:

npm install --save notifylog

2. Next, import the NotifyLog module in your Express app:

const { NotifyLog } = require('notifylog');

3. Set up your NotifyLog client by providing your API key and desired notification channels:

const notifyLog = new NotifyLog('YOUR_API_KEY_HERE')

4 Create the error middleware function and use the NotifyLog client to send the error to your desired channels:

const express = require("express");
const { NotifyLog } = require("notifylog");

const app = express();
const notifyLog = new NotifyLog('YOUR_API_KEY_HERE')

app.get("/", (req, res, next) => {
  throw new Error('sample error');
});

app.use((err, req, res, next) => {
  const markdown = "```js\n" + err.stack + "\n```";
  notifylog.send({
    name: "Error Occurred",
    description: `Error: ${err.message}`,
    channel: "errors", //put any name for your channel
    icon: "❌",
    notify: true,
    tags: {
      "path": `${req.url} (${req.method})`,
      "date": new Date().toLocaleString(),
      "user-agent": req.headers["user-agent"],
      "ip": req.headers["x-forwarded-for"] || req.connection.remoteAddress
    },
    message: markdown
  });
  
  next(err);
});

app.listen(3000, () => {
  console.log("Server listening on port 3000");
});

That's it! Now any errors generated by your Express app will be captured by the error middleware and sent to your desired notification channels via NotifyLog. This will help you stay on top of any issues and ensure a smooth user experience for your app.

Join the NotifyLog beta and streamline your team's routines with centralized events and data-driven management! Sign up now to try out all of our features and give us your feedback.