GreaseMonkey script for YouTrack

enhance.js

// ==UserScript==
// @name        Enhance YT
// @namespace   youtrack
// @description Enhance YT
// @include     https://.../youtrack/issue/*
// @version     1
// @run-at 			document-end
// @grant       none
// ==/UserScript==

/**
 * Remove comments until the date mapped via local storage to issue: 
 *     localStorage.setItem('ISSUE-123', '15 Jul 2014 12:40')
 */
let removeComments = () => {
  let issue = document.location.href.split('/').pop();
  let deleteUntil = Date.parse(localStorage.getItem(issue));

  if (deleteUntil != NaN) {
    //$('.comment-row:has(.comment_deleted)').remove();

    document.querySelectorAll('.comment-row').forEach((comment) => {
      let dt = comment.querySelector('.comment-date');
      let commentDate = Date.parse(dt.innerText);

      if (commentDate < deleteUntil) {
        comment.remove();
      }
    });
  }
}

/**
 * Converts all h4 headers to collapsible blocks.
 */
let convertHeadersToCollapsibleSections = () => {
  document.querySelectorAll('.description_fsi>div>h4').forEach((h) => wrapCollapse(h, 'H4'));
}

let wrapCollapse = (header, headerTag) => {
  let wrapper = document.createElement('div', {'class': 'wiki text prewrapped'});
  wrapper.innerHTML = `
    <span class="wiki-plus" onclick="WikiUtil.wikiCollapse(this)"></span>
    <span class="wiki-cut-title"></span>
    <span class="wiki-hellip">…</span>
    <div class="wiki-hidden"></div> 
  `;

  let wTitle = wrapper.querySelector('.wiki-cut-title');
  wTitle.innerText = header.innerText;    

  let wContainer = wrapper.querySelector('.wiki-hidden');
  wContainer.append(header.cloneNode(true));

  allNextUntil(header, headerTag).forEach((el) => {
    console.log(el.tagName);
    el.remove();
    wContainer.append(el);
  });

  header.replaceWith(wrapper);
}

let allNextUntil = (from, tagName) => {
  let elements = [];
  var el = from.nextElementSibling;
  while (el != null && el.tagName != tagName) {
    elements.push(el);
    el = el.nextElementSibling;
  }
  return elements;
}

removeComments();
convertHeadersToCollapsibleSections();