Get the number intervals for seconds in a time field:
var x = document.getElementById("myTime").step;
Click the button to display the value of the step attribute of the time field for seconds interval.
<!DOCTYPE html> <html> <body> Time: <input type="time" id="myTime" step="5"> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {/*from ww w.j a v a2 s .c o m*/ var x = document.getElementById("myTime").step; document.getElementById("demo").innerHTML = x; } </script> </body> </html>