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How to create previous and next button and non-working on end position using JavaScript ?

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In this article, the task is to create the previous and next button that doesn’t work on the end positions with the help of JavaScript.

Approach:

  • Here we are going to add a disabled attribute to the pre button when it is at the start position which is 1 for us and remove the disabled attribute when it is not at the start (1) position.
  • And same for the next button, add a disabled attribute when it is at the end position which is 5 for us, and remove the disabled attribute when it is not at the end position.

Example: This example shows the use of the above-explained approach.

HTML




<!DOCTYPE html>
<html lang="en">
<body>
    <div class="container">
        <div class="no-box">
            <span class="no">1</span>
        </div>
  
        <button class="btn" onclick="prev()">
            prev
        </button>
  
        <button class="btn" onclick="next()">
            next
        </button>
    </div
</body>
</html>


CSS




.container {
    margin: 100px 400px;
}
  
.no-box {
    padding-left: 30px;
    font-size: 60px;
}
  
.btn {
    background-color: rgb(179, 179, 179);
}
  
.btn:hover {
    color: white;
    background-color: green;
}


Javascript




<script>
    var no_box = document
        .querySelector('.no-box');
          
    var i = 1;
      
    function prev() {
      
        // Start position 
        if (i == 1) {
      
            // Add disabled attribute on
            // prev button
            document.getElementsByClassName(
                    'prev').disabled = true;
      
            // Remove disabled attribute 
            // from next button 
            document.getElementsByClassName(
                    'next').disabled = false;
        } else {
            i--;
            return setNo();
        }
    }
      
    function next() {
      
        // End position
        if (i == 5) {
      
            // Add disabled attribute on 
            // next button
            document.getElementsByClassName(
                    'next').disabled = true;
      
            // Remove disabled attribute
            // from prev button
            document.getElementsByClassName(
                    'prev').disabled = false;
        } else {
            i++;
            return setNo();
        }
    }
      
    function setNo() {
      
        // Change innerhtml
        return no_box.innerHTML = i;
    }
</script>


Output: Click here to check the live Output.

Create previous and next button and non-working on end position

Create previous and next button and non-working on end position



Last Updated : 16 Jan, 2023
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