Responsive Side Navigation Slider

Copy the code below onto your HTMl page

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {
  font-family: Arial, sans-serif;
  }

.left-nav {
  height: 100%;
  width: 0;
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  transition: 0.2s;
  padding-top: 10px;
   }

 a {
      width:300px;
 }

.left-nav a {
  padding: 8px 8px 8px 32px;
  text-decoration: none;
  font-size: 25px;
  color: blue;
  display: block;
  transition: 0.2s;
}

.left-nav a:hover {
  color: darkgreen;  
}

span1 {
 font-size: 30px;
 cursor:pointer;
}


span1, a1 {
  display: none;
}

a1 {
  cursor: pointer;
}

  p {
        float: right; width: 70%;
    }

.left-nav .closex {
  position: absolute;
  top: 0;
  right: 25px;
  font-size: 36px;
  margin-left: 50px;
}

@media screen and (max-width:765px) {
  .left-nav, span1, a1 {
    overflow-x: hidden;
    display: block;
        }

  .left-nav {
        background: white;
    }

  p {
 width: 100%; margin: 10px; float: left;
}
}

</style>
</head>
<body id="color1">

<div id="navigation" class="left-nav">
  <a1 href="javascript:void(0)" class="closex" onclick="closeNavbar()">×</a1>
  <a href="#">Home</a>
  <a href="#">Health</a>
  <a href="#">Beauty</a>
  <a href="#">Contact</a>
</div>


<span1 onclick="navBar()">☰ Healthy Lifestyle</span1>

<script>
function navBar() {
  document.getElementById("navigation").style.width = "300px";
  document.getElementById("color1").style.background = "rgba(100, 100, 100, 0.5)";
 }

function closeNavbar() {
  document.getElementById("navigation").style.width = "0";
  document.getElementById("color1").style.background = "white"; 
}
</script>
   
<p>This is a body text.This is a body text.This is a body text.This is a body text.This is a body text.</p>
<p>This is a body text.This is a body text.This is a body text.This is a body text.This is a body text.</p>
</body>
</html>