Change the legal number intervals for milliseconds in a local date field:
document.getElementById("myLocalDate").step = ".020";
Click the button to change the value of the step attribute of the local date field for milliseconds interval.
<!DOCTYPE html> <html> <body> Date: <input type="datetime-local" id="myLocalDate" step=".1"> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {/*from www .j a v a2 s . c om*/ document.getElementById("myLocalDate").step = ".020"; document.getElementById("demo").innerHTML = "The value of the step attribute was changed from '.1' to '.050'."; } </script> </body> </html>