Delete youtube comments activity

youtube_comments_deleter.js

// ==UserScript==
// @name		Delete youtube comments activity
// @version		1
// @grant		none
// @include		https://myactivity.google.com/page*
// ==/UserScript==

const DELETE_MAX_ENTRIES_AFTER_PAGE_RELOAD = 1;

(function(d) {
  if (/\bpage=youtube_comments\b/.test(location.search)) {
    
    var deleteButtons = [];
    var youtubeImgs = query(d, 'img[src="https://www.gstatic.com/images/branding/product/2x/youtube_24dp.png"]');
    for (var i=0, max=youtubeImgs.length; i < max; i++) {
	var btnContainer = youtubeImgs[i].parentNode.parentNode.parentNode;
      	var deleteButton = query(btnContainer, 'button')[0];
        deleteButtons.push(deleteButton);
       
    }
    for (var i=0; i < DELETE_MAX_ENTRIES_AFTER_PAGE_RELOAD; i++){
    	deleteButtons[i].click();
    }
  }
  
  function query(startNode, selector) {
    try {
      var nodes = Array.prototype.slice.call(
          startNode.querySelectorAll(selector));
      return nodes;	
    } catch(e){}
    return [];
  }
  
})(document);