Spam_script_Tampermonkey.js

// ==UserScript==
// @name         Whatsapp spam 2.0
// @namespace    https://github.com/macr1408/Whatsapp-scripts
// @version      2.0
// @description  Made by Macr1408
// @author       Macr1408
// @match        https://web.whatsapp.com/
// @grant        none
// @icon         https://k60.kn3.net/58A8A056B.png
// @icon64       https://k60.kn3.net/58A8A056B.png
// ==/UserScript==

var timer = setInterval(general,1000);

    function general(){
        if(document.getElementsByClassName("app-wrapper-web")[0] != null){
            var item2 = document.getElementsByClassName("_3auIg")[0];
            var panel = document.getElementsByClassName("swl8g")[0];
            var element = item2.cloneNode(true);							  // Create text and reps inputs
            element.style.zIndex = 0;                // This way the menu doesn't go below our app
            element.innerHTML = "<input type='text' id='mensaje' placeholder='Message' style='margin-right:10px' size='30'><input type='number' min='1' id='repeticiones' style='width:50px;padding-left:5px;margin-right:5px'>Times<div id='spam' data-icon=\"send\" class=\"img icon icon-send\" style='margin-left: 5px;cursor:pointer;'><svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 24 24\" width=\"24\" height=\"24\"><path opacity=\".4\" d=\"M1.101 21.757L23.8 12.028 1.101 2.3l.011 7.912 13.623 1.816-13.623 1.817-.011 7.912z\"></path></svg></div>";
            panel.insertBefore(element, panel.childNodes[1]);					  // Insert everything we have created
            document.getElementById("spam").addEventListener("click", spam);     // Assign a function to the botton
            clearInterval(timer);
        }else{
            console.log("WS Spam: Waiting for whatsapp to load...");
        }
    }

    function dispatch(input, message) {
        InputEvent = Event || InputEvent;
        var evt = new InputEvent('input', {						// Create a new event from type "input"
            bubbles: true,
	    composer: true
        });
        input.innerHTML = message;								// Get text to spam
        input.dispatchEvent(evt);								// Fire the event (inserts text) in the input field.
        document.querySelector("#main > footer > div._3pkkz.copyable-area > div:nth-child(3) > button > span").click(); 			// Press send button
    }

    function spam(){
        var text = document.getElementById("mensaje").value;       // Get text to spam
        var reps = document.getElementById("repeticiones").value;  // Get number of repetitions
        var input = document.querySelector("#main > footer > div._3pkkz.copyable-area > div._1Plpp > div > div._2S1VP.copyable-text.selectable-text");  // Select the input
        var counter = 1; 											// Initialize a counter
        while(counter <= reps){									// Iterate the number of repetitions needed
            dispatch(input, text); 									// Spam!
            counter++;
        }
    }