Decrement the minutes by 1 (default):
document.getElementById("myTime").stepDown();
Click the button to decrement the value of the time field by 1 minute.
This is the same as clicking the down arrow on the right side of the time field for the "minute" section.
<!DOCTYPE html> <html> <body> Time: <input type="time" id="myTime" value="21:43:54"> <button onclick="myFunction()">Test</button> <script> function myFunction() {//www. j ava2 s .c o m document.getElementById("myTime").stepDown(); } </script> </body> </html>