Build a Telegram Bot in Node.js for Web Page Change Detection

The Telegram Bot API provides everything we need to build applications that use Telegram messages as an interface. It enables notification automation via Telegram and more because of its extensive technology integration capabilities.

In this project, we’ll build a Node script that accepts a few command-line options. We’ll download the page to the URL received as an input using the Node.js Fetch API. Then, we’ll access and store its HTML. We’ll repeat this procedure regularly over a configurable time frame, verifying whether the target page’s content has changed since the last check.

Finally, we’ll use the Node.js Telegram Bot API client to send a message informing a Telegram bot about the page changes.