Display form values after clicking Submit button using event.preventdefault() - jQuery?

jQuery Web Development Front End Technology

For this, use document.getElementById(“”) along with addEventListener().

Example

Following is the code −

<!DOCTYPE html>
<html lang="en">
<head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <title>Document</title>
</head>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<body>
   <form id="details">
      FirstName:
         <label><input type="text" id="firstName" /> </label>
         <br>
      LastName:
         <label><input type="text" id="lastName" /> </label>
         <br>
      <input type="submit">
   </form>
</body>
<script>
   const formDetails = document.getElementById("details");
   formDetails.addEventListener("submit", async (ev) => {
      ev.preventDefault();
      var fName = document.getElementById("firstName").value;
      var lName = document.getElementById("lastName").value;
      console.log("First Name=" + fName);
      console.log("Last Name=" + lName);
   })
</script> 
</html>

To run the above program, save the file name “anyName.html(index.html)”. Right click on the file and select the option “Open with Live Server” in VS Code editor.

This will produce the following output −