How to create: Collapsible side panel

Create a collapsed side panel

First step - Add HTML:

<div id="mySidepanel" class="sidepanel">
  <a href="javascript:void(0)" class="closebtn" onclick="closeNav()">×</a>
  <a href="#">About</a>
  <a href="#">Services</a>
  <a href="#">Clients</a>
  <a href="#">Contact</a>
</div>
<button class="openbtn" onclick="openNav()">☰ Toggle Sidepanel</button>
<h2>Collapsed Sidepanel</h2>
<p>Content...</p>

Second step - Add CSS:

/* Side panel menu */
.sidepanel {
  height: 250px; /* Specify a height */
  width: 0; /* 0 width - change this with JavaScript */
  position: fixed; /* Stay in place */
  z-index: 1; /* Inasaidia kuwa kwenye juu */
  top: 0;
  left: 0;
  background-color: #111; /* Mawili */
  overflow-x: hidden; /* Inapunguza ukia ukishika hata kwenye ukitumia barafu za kiukia */
  padding-top: 60px; /* Inaingia matukio kwenye eneo hadi kima 60px ya kikagumba */
  transition: 0.5s; /* Inaichukua sidebar hadi 0.5 sekunde wa kichukua kina */
}
/* Kiungo cha sidebar */
.sidepanel a {
  padding: 8px 8px 8px 32px;
  text-decoration: none;
  font-size: 25px;
  color: #818181;
  display: block;
  transition: 0.3s;
}
/* Inaisha rangi yake kwamba unapokea kwenye kiungo cha navigesheni */
.sidepanel a:hover {
  color: #f1f1f1;
}
/* Inaisha eneo na stili ya botton ya kuzima (kwenye giza ya kushika) */
.sidepanel .closebtn {
  position: absolute;
  top: 0;
  right: 25px;
  font-size: 36px;
  margin-left: 50px;
}
/* Inaisha stili ya mtiririko wa kufungua sidebar */
.openbtn {
  font-size: 20px;
  cursor: pointer;
  background-color: #111;
  color: white;
  padding: 10px 15px;
  border: none;
}
.openbtn:hover {
  background-color: #444;
}

Tatu - Ongeza JavaScript:

/* Inaisha kuuza uwezo wa sidebar hadi 250px (inaonyesha) */
function openNav() {
  document.getElementById("mySidepanel").style.width = "250px";
}
/* Inaisha kuuza uwezo wa sidebar hadi 0 (inaichukua) */
function closeNav() {
  document.getElementById("mySidepanel").style.width = "0";
}

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