Get the default value of a date field:
var x = document.getElementById("myDate").defaultValue;
Click the button to display the default value of the date field.
<!DOCTYPE html> <html> <body> <input type="date" id="myDate" value="2020-02-10"> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {/*from www. j ava2 s .c om*/ var x = document.getElementById("myDate").defaultValue; document.getElementById("demo").innerHTML = x; } </script> </body> </html>