Creating a WhatsApp bot using Node.js requires a different approach than using the Telegram Bot API. WhatsApp does not provide a public API for building bots, but there are a few different ways to build a WhatsApp bot using Node.js.

One way to build a WhatsApp bot is to use the Twilio API for WhatsApp. Twilio is a cloud communications platform that provides an API for sending and receiving WhatsApp messages. To use Twilio for WhatsApp, you will need to sign up for a Twilio account and obtain a Twilio phone number that is WhatsApp-enabled.

Here is an example of a basic WhatsApp bot using the Twilio Node.js library:

constaccountSid='YOUR_ACCOUNT_SID';constauthToken='YOUR_AUTH_TOKEN';constclient=require('twilio')(accountSid,authToken);// replace with your Twilio phone numberconstfrom='whatsapp:+14155238886';client.messages.create({body:'Hello World!',from:from,to:'whatsapp:+1234567890'}).then(message=>console.log(message.sid)).done();

This example sends a message with the text "Hello World!" from the Twilio phone number to the specified WhatsApp number.

You will need to replaceYOUR_ACCOUNT_SID andYOUR_AUTH_TOKEN with the appropriate values from your Twilio account, and replace+1234567890 with the phone number of the recipient.

You can also use Twilio's WhatsApp Sandbox to test your bot. The Sandbox allows you to test your bot by sending and receiving messages to a pre-approved number, rather than a real phone number.

Another way is to use WhatsApp Business API which can be accessed via WhatsApp Business Account, this will give you access to more functionality and features compared to Twilio.

Please keep in mind that WhatsApp's policies strictly prohibit the use of automated messaging systems and bots on the platform. Make sure to read and abide by WhatsApp's guidelines when building your bot.

Suggested library:wwebjs