A simple example to replace string

JavaScript / HTML/ CSS Code

Output

<!DOCTYPE html>
<html>
<head>
<style>
.divclass {
  background: #038D98;
  height: auto;
  width:350px;
  border-radius: 15px;
  padding:20px;
  font-size:16px;
  color:#fff;  
}
#repstring {
    background: #FA4238;
}
</style>
</head>

<body>
<div class="divclass"><p><strong>Source string:</strong> A JavaScript tutorial with demo</p> 
<p><strong>Executing replace method: </strong> </p><p style="background-color: green;"> var str_rep = src_str.replace("JavaScript","JS");</p>
<p><strong>After replace method:  </strong><span id="repstring"></span></p>

<script type="text/javascript">
var src_str = ("A JavaScript tutorial with demo");
var str_rep = src_str.replace("JavaScript","JS");

document.getElementById("repstring").innerHTML = str_rep;

</script>
</body>
</html>

Source string: A JavaScript tutorial with demo

Executing replace method:

var str_rep = src_str.replace("JavaScript","JS");

After replace method: