Use the oninput event attribute to trigger when an element gets user input. You can try to run the following code to implement oninput attribute −
Example
<!DOCTYPE html> <html> <body> <p>Write your name below:</p> <input type = "text" id = "myid" oninput="display()"> <p id="test"></p> <script> function display() { var p = document.getElementById("myid").value; document.getElementById("test").innerHTML = "Your answer is " + p; } </script> </body> </html>