How to Create a Form Dynamically with the JavaScript?

Last Updated : 10 May, 2022

The task is to create an HTML form dynamically with the help of JavaScript. There are two approaches that are discussed below.
Approach 1: Use document.createElement() to create the new elements and use setAttribute() method to set the attributes of elements. Append these elements to the <form> element by appendChild() method. Finally append the <form> element to the <body> element of the document. This example creates a Registration form.

Example:

html

<!DOCTYPE html>
<html>
    <head>
        <title>
            Create a Form Dynamically with 
            the JavaScript
        </title>
    </head>
    <body style="text-align: center;">
        <h1 style="color: green;">
            GeeksforGeeks
        </h1>
        <p>
          Click on the button to create
          a form dynamically
        </p>
        <button onClick="GFG_Fun()">
            click here
        </button>
        <p id="GFG_DOWN"></p>
 <script>
    var down = document.getElementById("GFG_DOWN");
           
    // Create a break line element
    var br = document.createElement("br"); 
    function GFG_Fun() {
               
    // Create a form dynamically
    var form = document.createElement("form");
    form.setAttribute("method", "post");
    form.setAttribute("action", "submit.php");
 
    // Create an input element for Full Name
    var FN = document.createElement("input");
    FN.setAttribute("type", "text");
    FN.setAttribute("name", "FullName");
    FN.setAttribute("placeholder", "Full Name");
 
     // Create an input element for date of birth
     var DOB = document.createElement("input");
     DOB.setAttribute("type", "text");
     DOB.setAttribute("name", "dob");
     DOB.setAttribute("placeholder", "DOB");
 
     // Create an input element for emailID
     var EID = document.createElement("input");
     EID.setAttribute("type", "text");
     EID.setAttribute("name", "emailID");
     EID.setAttribute("placeholder", "E-Mail ID");
 
      // Create an input element for password
      var PWD = document.createElement("input");
      PWD.setAttribute("type", "password");
      PWD.setAttribute("name", "password");
      PWD.setAttribute("placeholder", "Password");
 
       // Create an input element for retype-password
       var RPWD = document.createElement("input");
       RPWD.setAttribute("type", "password");
       RPWD.setAttribute("name", "reTypePassword");
       RPWD.setAttribute("placeholder", "ReEnter Password");
 
                // create a submit button
                var s = document.createElement("input");
                s.setAttribute("type", "submit");
                s.setAttribute("value", "Submit");
                 
                // Append the full name input to the form
                form.appendChild(FN); 
                 
                // Inserting a line break
                form.appendChild(br.cloneNode()); 
                 
                // Append the DOB to the form
                form.appendChild(DOB); 
                form.appendChild(br.cloneNode()); 
                 
                // Append the emailID to the form
                form.appendChild(EID); 
                form.appendChild(br.cloneNode()); 
                 
                // Append the Password to the form
                form.appendChild(PWD); 
                form.appendChild(br.cloneNode()); 
                 
                // Append the ReEnterPassword to the form
                form.appendChild(RPWD); 
                form.appendChild(br.cloneNode()); 
                 
                // Append the submit button to the form
                form.appendChild(s); 
 
                document.getElementsByTagName("body")[0]
               .appendChild(form);
            }
        </script>
    </body>
</html>

Output:

Approach 2: This approach is somewhat similar to the previous one but using the JQuery method to append the elements. Use document.createElement() to create the new elements and use setAttribute() method to set the attributes of elements. Append these elements to the < form > element by append() method of JQuery. Finally append the <form> element to the <body> element of the document. This example creates a LOGIN form.

Example:

html

<!DOCTYPE html>
<html>
    <head>
        <title>
            Create a Form Dynamically 
            with the JavaScript
        </title>
    </head>
    <body style="text-align: center;">
        <h1 style="color: green;">
            GeeksforGeeks
        </h1>
        <p>
              Click on the button to create 
            a form dynamically
        </p>
        <button onClick="GFG_Fun()">
            click here
        </button>
        <p id="GFG_DOWN"></p>
        <script>
            var down = document.getElementById("GFG_DOWN");
            function GFG_Fun() {
               
                // Create a form dynamically
                var form = document.createElement("form");
                form.setAttribute("method", "post");
                form.setAttribute("action", "submit.php");
 
                // Create an input element for emailID
                var ID = document.createElement("input");
                ID.setAttribute("type", "text");
                ID.setAttribute("name", "emailID");
                ID.setAttribute("placeholder", "E-Mail ID");
 
                // Create an input element for password
                var PWD = document.createElement("input");
                PWD.setAttribute("type", "password");
                PWD.setAttribute("name", "password");
                PWD.setAttribute("placeholder", "Password");
 
                // Create a submit button
                var s = document.createElement("input");
                s.setAttribute("type", "submit");
                s.setAttribute("value", "Submit");
 
                // Append the email_ID input to the form
                form.append(ID); 
               
                // Append the password to the form
                form.append(PWD); 
               
                // Append the button to the form
                form.append(s); 
 
                document.getElementsByTagName("body")[0]
               .appendChild(form);
            }
        </script>
    </body>
</html>

Output:

JavaScript is best known for web page development but it is also used in a variety of non-browser environments. You can learn JavaScript from the ground up by following this JavaScript Tutorial and JavaScript Examples.

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