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<!DOCTYPE html> <html> <body> <p>Change the email address of the email field, and then click the button below.</p> E-mail: <input type="email" id="myEmail" value="johndoe@example.com"> <p>Note that the default value is not affected when you change the value of the email field.</p> <button type="button" onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myEmail"); var defaultVal = x.defaultValue; var currentVal = x.value; if (defaultVal == currentVal) { document.getElementById("demo").innerHTML = "Default value and current value is the same: " + x.defaultValue + " and " + x.value + "<br>Change the email address of the email field to see the difference!"; } else { document.getElementById("demo").innerHTML = "The default value was: " + defaultVal + "<br>The new, current value is: " + currentVal; } } </script> </body> </html>