Just use below code for following purpose
- How to show/hide an element on checkbox checked/unchecked states using jQuery?
 - jquery show-hide div based on checkbox value
 - If checkbox is checked show div
 - on checkbox checked show div jquery
 - How to show and hide input fields based on checkbox selection
 
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>How to show/hide an element on checkbox checked/unchecked states using jQuery?</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
 <script>
function myFunction() {
  var checkBox = document.getElementById("cwebsite");
 
  var text = document.getElementById("cwimg");
  
  if (checkBox.checked == true){
    text.style.display = "block";
  } else {
     text.style.display = "none";
  }
}
 </script>
</head>
<body>
    <form>
        <h3>Select your favorite sports:</h3>
        <input type="checkbox" value="1"  onclick="myFunction()" id="cwebsite" class="form-control" name="cwebsite" >
        <img src="" id="cwimg">
    </form>
</body>
</html>