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Editorial Team
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Asked: 2026-06-18T18:44:42+00:00

I’ve read many blogs and posts on dynamically adding fieldsets, but they all give

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I’ve read many blogs and posts on dynamically adding fieldsets, but they all give a very complicated answer. What I require is not that complicated.

My HTML Code:

<input type="text" name="member" value="">Number of members: (max. 10)<br />
<a href="#" id="filldetails">Fill Details</a>

So, a user will enter an integer value (I’m checking the validation using javascript) in the input field. And on clicking the Fill Details link, corresponding number of input fields will appear for him to enter. I want to achieve this using javascript.

I’m not a pro in javascript. I was thinking how can I retrieve the integer filled in by the user in input field through the link and displaying corresponding number of input fields.

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1 Answer

  1. Editorial Team

    You could use an onclick event handler in order to get the input value for the text field. Make sure you give the field an unique id attribute so you can refer to it safely through document.getElementById():

    If you want to dynamically add elements, you should have a container where to place them. For instance, a <div id="container">. Create new elements by means of document.createElement(), and use appendChild() to append each of them to the container. You might be interested in outputting a meaningful name attribute (e.g. name="member"+i for each of the dynamically generated <input>s if they are to be submitted in a form.

    Notice you could also create <br/> elements with document.createElement('br'). If you want to just output some text, you can use document.createTextNode() instead.

    Also, if you want to clear the container every time it is about to be populated, you could use hasChildNodes() and removeChild() together.

    <html>
<head>
    <script type='text/javascript'>
        function addFields(){
            // Generate a dynamic number of inputs
            var number = document.getElementById("member").value;
            // Get the element where the inputs will be added to
            var container = document.getElementById("container");
            // Remove every children it had before
            while (container.hasChildNodes()) {
                container.removeChild(container.lastChild);
            }
            for (i=0;i<number;i++){
                // Append a node with a random text
                container.appendChild(document.createTextNode("Member " + (i+1)));
                // Create an <input> element, set its type and name attributes
                var input = document.createElement("input");
                input.type = "text";
                input.name = "member" + i;
                container.appendChild(input);
                // Append a line break 
                container.appendChild(document.createElement("br"));
            }
        }
    </script>
</head>
<body>
    <input type="text" id="member" name="member" value="">Number of members: (max. 10)<br />
    <a href="#" id="filldetails" onclick="addFields()">Fill Details</a>
    <div id="container"/>
</body>
</html>

    See a working sample in this JSFiddle.

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