Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<body>

Time: <input type="time" id="myTime" step="5">

<p>Click the button to display the value of the step attribute of the time field (seconds interval).</p>

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

<script>
function myFunction() {
    var x = document.getElementById("myTime").step;
    document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>