Tampermonkey script to use with https://www.slackdeletron.com

slackdeletron_file_nuker.js

// ==UserScript==
// @name         Slackdeletron file nuke
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Nuke all files in any slackdeletron search...
// @author       You
// @match        https://www.slackdeletron.com/
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    var timeoutStorageVar;

    var mutationObserverTargetNode = document.querySelector('.Header__Meta');
    var observerOptions = {
        childList: true,
        subtree: true,
    }

    function insertNukeButtonCallback(mutationList, observer) {
        mutationList.forEach((mutation) => {
            if (mutation.type === 'childList') {
                if (mutation.removedNodes.length !== 0) {
                    if (document.getElementById('NukeButton') === null) {
                        // Good to go
                        var nukeButton = document.createElement('button');
                        nukeButton.appendChild(document.createTextNode('Nuke all files (slowly)'));
                        nukeButton.id = 'NukeButon';
                        nukeButton.setAttribute('style', 'background: red; color: white');
                        nukeButton.setAttribute('class', 'Button Button__Large');
                        nukeButton.addEventListener('click', function() {
                            // alert('hi');
                            delFile();
                        });

                        document.getElementsByClassName('Button Button__Large')[0].parentNode.appendChild(nukeButton);
                    }

                    observer.disconnect();
                    return;
                }
            }
        });
    }

    var mutationObserver = new MutationObserver(insertNukeButtonCallback);
    mutationObserver.observe(mutationObserverTargetNode, observerOptions);

    // Source: https://github.com/drewminns/slackdeletron/issues/36#issuecomment-395613555
    function delFile() {
        // first check if we need to do another search
        var list = document.getElementsByTagName('h2')
        for (var i = 0; i < list.length; i++) {
            if (list[i] && list[i].innerText && list[i].innerText == 'Zap! Deleted!') {
                document.getElementsByClassName('Button Button__Large')[0].click()
            }
        }

        // look for a delete button
        var button = document.getElementsByClassName('File__Button')[0]
        if (button) {
            button.click()
        }
        else {
            clearTimeout(timeoutStorageVar);
            return;
        }

        var interval = 1000 + (Math.random() * 2000)
        timeoutStorageVar = setTimeout(delFile, interval)
    }
})();

Usage:

1. Install tampermonkey
2. Install this script
3. Log in to slackdeletron
4. Do a search
5. Press the "Nuke all files" button and watch the files die