Development

Often using callbacks and loops, it happens that we get repeated value for one variable, generally the last one. For example if you try to call a function (callback) using an array inside a for loop, you will end up calling it with the same data. Consider this code:

Almost all web pages make use of HTTP requests to load dynamic content after they have loaded. It might be using some library or simply using the XMLHttpRequest. It is also popularly known as AJAX request. Here we will explore the vanilla JS way to perform the request.

I will demonstrate a simple Telegram bot that will allow the users to monitor web URLs for changes and will notify users when any changes are found.

There are a lot of Telegram bots out there, and now we have one (or a couple) more now - made by you. So, what to do to make it truly outstanding?

BotFather is the one bot to rule them all. It will help you create new bots and change settings for existing ones.

Telegram bots are quite easy to build. They can be up and running within few minutes. But managing users is another challenge, that requires database. As bots need to do work intelligently by recognising who asked for what. The structure of database for bots derives from the API methods of Telegram.

After a user has started a conversation with your bot, you can send the user messages using the Telegram Bot API. You can not only send text messages to the user, but also you can send other types of messages including images, videos, audio, documents and any other type of file.

Now, that you have set up your code in server, let's begin with coding. Here, we will look at how the interaction with bot happens (what actually goes behind the scenes) and how you bot needs to react for a proper workflow.

After you have created a new bot by chatting with BotFather, now you are ready to implement the code for bot. But, before you jump to coding, you need to decide where to host your code.

Now, that you know all about Telegram Bots, lets dig in and create a new bot.