<link href='https://unpkg.com/boxicons@2.0.7/css/boxicons.min.css' rel='stylesheet'>

<div class="kupaneg close">
  <div class="agotiptip-detaliza">
  <i class='bx bxs-alarm-snooze'></i>
  <span class="kasnulasu">ZORNET.RU</span>
  </div>
  <ul class="upegedsa">
  <li>
  <a href="#">
  <i class='bx bx-wrench' ></i>
  <span class="link_name">Скрипты</span>
  </a>
  <ul class="kaned-sakopa blank">
  <li><a class="link_name" href="#">Шаблоны</a></li>
  </ul>
  </li>
  <li>
  <div class="iocn-link">
  <a href="#">
  <i class='bx bx-wifi' ></i>
  <span class="link_name">Коды сайта</span>
  </a>
  <i class='bx bxs-chevron-down arrow' ></i>
  </div>
  <ul class="kaned-sakopa">
  <li><a class="link_name" href="#">Категория</a></li>
  <li><a href="#">HTML & CSS</a></li>
  <li><a href="#">JavaScript</a></li>
  <li><a href="#">PHP & MySQL</a></li>
  </ul>
  </li>
  <li>
  <div class="iocn-link">
  <a href="#">
  <i class='bx bx-taxi' ></i>
  <span class="link_name">Статьи</span>
  </a>
  <i class='bx bxs-chevron-down arrow' ></i>
  </div>
  <ul class="kaned-sakopa">
  <li><a class="link_name" href="#">Блоги</a></li>
  <li><a href="#">Дизайнер</a></li>
  <li><a href="#">Веб-мастер</a></li>
  <li><a href="#">Стилист</a></li>
  </ul>
  </li>
  <li>
  <a href="#">
  <i class='bx bxs-badge-check' ></i>
  <span class="link_name">Аналитика</span>
  </a>
  <ul class="kaned-sakopa blank">
  <li><a class="link_name" href="#">Анализ</a></li>
  </ul>
  </li>
  <li>
  <a href="#">
  <i class='bx bxs-bomb' ></i>
  <span class="link_name">Переход</span>
  </a>
  <ul class="kaned-sakopa blank">
  <li><a class="link_name" href="#">Дизайн</a></li>
  </ul>
  </li>
  <li>
  <div class="iocn-link">
  <a href="#">
  <i class='bx bx-plug' ></i>
  <span class="link_name">Плагины</span>
  </a>
  <i class='bx bxs-badge-dollar' ></i>
  </div>
  <ul class="kaned-sakopa">
  <li><a class="link_name" href="#">Плагины</a></li>
  <li><a href="#">Скачать</a></li>
  <li><a href="#">Купить</a></li>
  <li><a href="#">Забрать</a></li>
  </ul>
  </li>
  <li>
  <a href="#">
  <i class='bx bxs-beer' ></i>
  <span class="link_name">Браузер</span>
  </a>
  <ul class="kaned-sakopa blank">
  <li><a class="link_name" href="#">Браузеры</a></li>
  </ul>
  </li>
  <li>
  <a href="#">
  <i class='bx bxl-youtube'></i>
  <span class="link_name">Шустрый</span>
  </a>
  <ul class="kaned-sakopa blank">
  <li><a class="link_name" href="#">Быстрый</a></li>
  </ul>
  </li>
  <li>
  <a href="#">
  <i class='bx bxl-telegram' ></i>
  <span class="link_name">Медленный</span>
  </a>
  <ul class="kaned-sakopa blank">
  <li><a class="link_name" href="#">Флэш</a></li>
  </ul>
  </li>
  <li>
  <div class="pronaya-setka">
  <div class="profile-content">
  <img src="http://zornet.ru/avatar/00/00/00132466.jpg" alt="zornet.ru">
  </div>
  <div class="name-job">
  <div class="profile_name">Запрос</div>
  <div class="job">Категория</div>
  </div>
  <i class='bx bxl-unity' ></i>
  </div>
  </li>
</ul>
  </div>
  <section class="doma-sazdelun">
  <div class="domasa-konvaena">
  <i class='bx bx-menu' ></i>
  <span class="text">Открыть</span>
  </div>
  </section>

.kupaneg{
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  width: 260px;
  background: #11101d;
  z-index: 100;
  transition: all 0.5s ease;
}
.kupaneg.close{
  width: 78px;
}
.kupaneg .agotiptip-detaliza{
  height: 60px;
  width: 100%;
  display: flex;
  align-items: center;
}
.kupaneg .agotiptip-detaliza i{
  font-size: 30px;
  color: #fff;
  height: 50px;
  min-width: 78px;
  text-align: center;
  line-height: 50px;
}
.kupaneg .agotiptip-detaliza .kasnulasu{
  font-size: 22px;
  color: #fff;
  font-weight: 600;
  transition: 0.3s ease;
  transition-delay: 0.1s;
}
.kupaneg.close .agotiptip-detaliza .kasnulasu{
  transition-delay: 0s;
  opacity: 0;
  pointer-events: none;
}
.kupaneg .upegedsa{
  height: 100%;
  padding: 30px 0 150px 0;
  overflow: auto;
}
.kupaneg.close .upegedsa{
  overflow: visible;
}
.kupaneg .upegedsa::-webkit-scrollbar{
  display: none;
}
.kupaneg .upegedsa li{
  position: relative;
  list-style: none;
  transition: all 0.4s ease;
}
.kupaneg .upegedsa li:hover{
  background: #1d1b31;
}
.kupaneg .upegedsa li .iocn-link{
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.kupaneg.close .upegedsa li .iocn-link{
  display: block
}
.kupaneg .upegedsa li i{
  height: 50px;
  min-width: 78px;
  text-align: center;
  line-height: 50px;
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
}
.kupaneg .upegedsa li.showMenu i.arrow{
  transform: rotate(-180deg);
}
.kupaneg.close .upegedsa i.arrow{
  display: none;
}
.kupaneg .upegedsa li a{
  display: flex;
  align-items: center;
  text-decoration: none;
}
.kupaneg .upegedsa li a .link_name{
  font-size: 18px;
  font-weight: 400;
  color: #fff;
  transition: all 0.4s ease;
}
.kupaneg.close .upegedsa li a .link_name{
  opacity: 0;
  pointer-events: none;
}
.kupaneg .upegedsa li .kaned-sakopa{
  padding: 6px 6px 14px 80px;
  margin-top: -10px;
  background: #1d1b31;
  display: none;
}
.kupaneg .upegedsa li.showMenu .kaned-sakopa{
  display: block;
}
.kupaneg .upegedsa li .kaned-sakopa a{
  color: #fff;
  font-size: 15px;
  padding: 5px 0;
  white-space: nowrap;
  opacity: 0.6;
  transition: all 0.3s ease;
}
.kupaneg .upegedsa li .kaned-sakopa a:hover{
  opacity: 1;
}
.kupaneg.close .upegedsa li .kaned-sakopa{
  position: absolute;
  left: 100%;
  top: -10px;
  margin-top: 0;
  padding: 10px 20px;
  border-radius: 0 6px 6px 0;
  opacity: 0;
  display: block;
  pointer-events: none;
  transition: 0s;
}
.kupaneg.close .upegedsa li:hover .kaned-sakopa{
  top: 0;
  opacity: 1;
  pointer-events: auto;
  transition: all 0.4s ease;
}
.kupaneg .upegedsa li .kaned-sakopa .link_name{
  display: none;
}
.kupaneg.close .upegedsa li .kaned-sakopa .link_name{
  font-size: 18px;
  opacity: 1;
  display: block;
}
.kupaneg .upegedsa li .kaned-sakopa.blank{
  opacity: 1;
  pointer-events: auto;
  padding: 3px 20px 6px 16px;
  opacity: 0;
  pointer-events: none;
}
.kupaneg .upegedsa li:hover .kaned-sakopa.blank{
  top: 50%;
  transform: translateY(-50%);
}
.kupaneg .pronaya-setka{
  position: fixed;
  bottom: 0;
  width: 260px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #1d1b31;
  padding: 12px 0;
  transition: all 0.5s ease;
}
.kupaneg.close .pronaya-setka{
  background: none;
}
.kupaneg.close .pronaya-setka{
  width: 78px;
}
.kupaneg .pronaya-setka .profile-content{
  display: flex;
  align-items: center;
}
.kupaneg .pronaya-setka img{
  height: 52px;
  width: 52px;
  object-fit: cover;
  border-radius: 16px;
  margin: 0 14px 0 12px;
  background: #1d1b31;
  transition: all 0.5s ease;
}
.kupaneg.close .pronaya-setka img{
  padding: 10px;
}

.kupaneg .pronaya-setka .profile_name,
.kupaneg .pronaya-setka .job{
  color: #fff;
  font-size: 18px;
  font-weight: 500;
  white-space: nowrap;
}
.kupaneg.close .pronaya-setka i,
.kupaneg.close .pronaya-setka .profile_name,
.kupaneg.close .pronaya-setka .job{
  display: none;
}
.kupaneg .pronaya-setka .job{
  font-size: 12px;
}
.doma-sazdelun{
  position: relative;
  background: #E4E9F7;
  height: 100vh;
  left: 260px;
  width: calc(100% - 260px);
  transition: all 0.5s ease;
}
.kupaneg.close ~ .doma-sazdelun{
  left: 78px;
  width: calc(100% - 78px);
}
.doma-sazdelun .domasa-konvaena{
  height: 60px;
  display: flex;
  align-items: center;
}
.doma-sazdelun .domasa-konvaena .bx-menu,
.doma-sazdelun .domasa-konvaena .text{
  color: #11101d;
  font-size: 35px;
}
.doma-sazdelun .domasa-konvaena .bx-menu{
  margin: 0 15px;
  cursor: pointer;
}
.doma-sazdelun .domasa-konvaena .text{
  font-size: 26px;
  font-weight: 600;
}
@media (max-width: 420px) {
  .kupaneg.close .upegedsa li .kaned-sakopa{
  display: none;
  }
}

<script>
  let arrow = document.querySelectorAll(".arrow");
  for (var i = 0; i < arrow.length; i++) {
  arrow[i].addEventListener("click", (e)=>{
  let arrowParent = e.target.parentElement.parentElement;//selecting main parent of arrow
  arrowParent.classList.toggle("showMenu");
  };);
  }
  let kupaneg = document.querySelector(".kupaneg");
  let kupanegBtn = document.querySelector(".bx-menu");
  console.log(kupanegBtn);
  kupanegBtn.addEventListener("click", ()=>{
  kupaneg.classList.toggle("close");
  };);
  </script>