JS script to replace emails with random emails

replace-emails.js

/**
 * Grok wrote this :)
 * The prompt: js script that i can run in browser console to detect all html tags which contain email.
 * i want to replace those emails from eg [email protected] to a random email based on random first and last name.
 */

// Function to generate completely random email with full name
function generateRandomFullEmail() {
    const firstNames = ['sandra', 'john', 'mary', 'peter', 'lisa', 'david', 'emma', 'robert'];
    const lastNames = ['smith', 'johnson', 'brown', 'taylor', 'wilson', 'davis', 'clark', 'lewis'];
    const domains = ['gmail.com', 'yahoo.com', 'outlook.com', 'hotmail.com', 'example.com'];
    
    // Get random first name
    const firstName = firstNames[Math.floor(Math.random() * firstNames.length)];
    
    // Get random last name
    const lastName = lastNames[Math.floor(Math.random() * lastNames.length)];
    
    // Get random domain
    const domain = domains[Math.floor(Math.random() * domains.length)];
    
    return `${firstName}${lastName}@${domain}`;
}

// Find and replace emails in all HTML elements
function replaceEmailsInPage() {
    // Regular expression for email detection
    const emailRegex = /\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}\b/g;
    
    // Get all HTML elements
    const elements = document.getElementsByTagName('*');
    
    for (let element of elements) {
        // Check text nodes
        for (let node of element.childNodes) {
            if (node.nodeType === 3) { // Text node
                const text = node.nodeValue;
                if (emailRegex.test(text)) {
                    const newText = text.replace(emailRegex, generateRandomFullEmail());
                    node.nodeValue = newText;
                }
            }
        }
        
        // Check attributes that might contain emails
        if (element.attributes) {
            for (let attr of element.attributes) {
                if (emailRegex.test(attr.value)) {
                    attr.value = attr.value.replace(emailRegex, generateRandomFullEmail());
                }
            }
        }
    }
    
    console.log('Email replacement with random full-name emails complete!');
}

// Run the function
replaceEmailsInPage();