Extract multiple phone numbers (private chat) from a WhatsApp group via WhatsApp Web

extract-whatsapp-numbers.js

// 1. Log in to WhatsApp Web (http://web.whatsapp.com)
// 2. Download https://github.com/wppconnect-team/wa-js/releases/download/nightly/wppconnect-wa.js
// 3. Open the file and copy its contents.
// 4. Navigate back to WhatsApp Web and press F12
// (*allow pasting* if necessary)
// 5. Open a private chat and paste this snippet into the browser console:

function storeActiveChat() {
    // Get the active chat user ID
    let chatId = WPP.chat.getActiveChat().id.user;

    // Retrieve existing chat IDs from localStorage or initialize an empty array
    let chatArray = JSON.parse(localStorage.getItem("chatIds")) || [];

    // Check if chatId already exists in the array
    if (!chatArray.includes(chatId)) {
        chatArray.push(chatId); // Add the new chat ID
        localStorage.setItem("chatIds", JSON.stringify(chatArray)); // Save back to localStorage
    }

    // Output the updated array
    console.log(chatArray);
}

// Call the function
storeActiveChat();

// 6. Repeat the previous for every chat (pasting `storeActiveChat()` is enough)
// as you can see, this is not suitable for bulk export but specific chats