Find out if a month field is read-only or not:
var x = document.getElementById("myMonth").readOnly;
Click the button to find out if the month field is read-only or not.
input elements with type=month is not supported in Firefox.
<!DOCTYPE html> <html> <body> <input type="month" id="myMonth" readonly> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {// ww w. j av a 2 s . co m var x = document.getElementById("myMonth").readOnly; document.getElementById("demo").innerHTML = x; } </script> </body> </html>