<!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>