Automate WhatsApp with ease using Whatsapp-web.js, a NodeJS client library that connects through the official WhatsApp Web app, reducing ban risks. Perfect for user or business accounts.
A WhatsApp client library for NodeJS that connects through the WhatsApp Web browser app whatsapp-web.js - https://wwebjs.dev, with the Github repository
For this project I have set a Github repository @boobo94/whatsapp-sender.
How to setup the project
yarn init
yarn add whatsapp-web.js qrcode-terminal
then should look like:
{
"name": "whatsapp-sender",
"version": "1.0.0",
"description": "",
"main": "index.js",
"type": "module",
"scripts": {
"start": "node index.js",
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "",
"license": "ISC",
"dependencies": {
"qrcode-terminal": "^0.12.0",
"whatsapp-web.js": "^1.22.2-alpha.4"
}
}
Create an index.js file and add the code:
import { Client } from "whatsapp-web.js";
import qrcode from 'qrcode-terminal';
import sendMessages from "./src/sendMessages.js";
const client = new Client();
client.on('qr', (qr) => {
console.log('QR RECEIVED', qr);
qrcode.generate(qr, { small: true });
});
client.on('ready', () => {
console.log('Client is ready!');
});
client.on('authenticated', (session) => {
// Save the session object however you prefer.
// Convert it to json, save it to a file, store it in a database...
console.log('Authenticated')
});
client.on('message', message => {
if (message.body === '!ping') {
message.reply('pong');
}
});
client.initialize();
Test it how it works
Start the codep project
yarn start
and you should see something like:
% yarn start
yarn run v1.22.19
$ node index.js
QR RECEIVED 2@+z3db4ckMTxcHkZDwWQ1Giql/nHg+J3orBdcPjik+Da8grWvNU80rx+MmZa2ow==,lZReDwpuYK+nakVa8B9/i1WhslxxbG3a2Nm+InE=,MwSE0qcS/nJ3k1yAU=,Xu2utPNJlPKbGEbvAyrvXI+igWG7QBZnNmcEnU=,1
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Authenticated
Client is ready!
Let’s test the implementation
As you can see, we have a code block:
client.on('message', message => {
if (message.body === '!ping') {
message.reply('pong');
}
});
Which listen for every message received. If the message is !ping, then it automatically replies with pong.
Now all you have to do is to send a message to the connected phone number, type !ping
How to automatically send messages to multiple numbers
Maybe you need to inform multiple clients or friends about the same topic or different messages. In this example, below I show you how to send the same message to all, but feel free to change the script and send different messages to each individual.
First of all I need to create the function which sends my notifications. Add it in your index.js file:
function sendMessages(client, data) {
for (const contact of data.contacts) {
// get the number id from whatsapp of this phone number
const numberDetails = await client.getNumberId(contact);
// if the phone number is a valid whatsapp account, send the message
if (numberDetails) {
const sendMessageData = await client.sendMessage(numberDetails._serialized, data.message); // send message
console.log(`Message sent to ${contact} successfully`);
} else {
console.log(`Mobile number <${contact}> is not registered`);
}
// add a delay of 5s to don't trigger any whatsapp api blocker
// !!! this is not necessary a safe method, but it may help
await new Promise(resolve => setTimeout(resolve, 5000));
}
}
As you can see in function definition it has two params:
client- the whatsapp client created abovedata- where are stored the contacts and the message
The object looks like below and it’s stored in data.js file, imported in index.js.
// data.js
export default {
message: "test message ",
contacts: [
"4072XYZXYZX",
"4072AXYZXYZ",
]
}
!!! Very important to use the international prefix for your country.
Then I have to call that function inside of ready event, so the events now looks like:
// index.js
import data from "./data.js";
client.on('ready', () => {
console.log('Client is ready!');
sendMessages(client, data)
});
Known issues & fixies
On whatsapp-web.js v1.22.1, after QR scanning is stucked.
In order to fix it, go to node_modules/whatsapp-web.js/src/CLient.js#175 (line 175) and replace
const INTRO_IMG_SELECTOR = '[data-testid="intro-md-beta-logo-dark"], [data-testid="intro-md-beta-logo-light"], [data-asset-intro-image-light="true"], [data-asset-intro-image-dark="true"]';
with
const INTRO_IMG_SELECTOR = 'div[role=\'textbox\']';
