A simple JavaScript snippet to spam a WhatsApp chat with a message repeating a given number of times. It requires the user to login to WhatsApp web on a computer on any modern browsers. The user can directly use this tool from the chat once the code is injected to the console.

• Login to WhatsApp web through https://web.whatsapp.com/
• Inject (paste) the code to browser's console (Find console in developer tools section of the browser's menu)
• Close the console and open a chat
• Type the message with #n# at the end to repeat the message n times (n should be a postive integer)
• Press Enter Key (Clicking the send button doesn't work)

• Hi there!#5# sends Hi there! five times
  
• Hi there! sends Hi there! once
  
• #5# Hi there! sends #5# Hi there! once
  
• Hi there!#2#3# sends Hi there!#2 three times
  

• WhatsApp may ban your account temporarily if you spam way too much, especially if you send over 10k messages a day

• Send messages in chunks smaller than 500 messages in a go to avoid browser from hanging.
• For effiecient spamming, Logon to pc using Multi-device beta feature on WhatsApp and turn off the internet on other connected devices