Get the legal week intervals:
var x = document.getElementById("myWeek").step;
Click the button to display the value of the step attribute of the week field.
input elements with type="week" are not supported in Internet Explorer or Firefox.
<!DOCTYPE html> <html> <body> Week: <input type="week" id="myWeek" step="3"> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {// ww w .j a v a 2 s .co m var x = document.getElementById("myWeek").step; document.getElementById("demo").innerHTML = x; } </script> </body> </html>