Change the default value of a datetime field:
document.getElementById("myLocalDate").defaultValue = "2020-01-02T11:42:42.510";
Click the button to change the default value of the datetime field.
<!DOCTYPE html> <html> <body> Date: <input type="datetime-local" id="myLocalDate" value="2014-11-16T15:25:33"> <button onclick="myFunction()">Test</button> <script> function myFunction() {/*from ww w . ja va 2 s . c o m*/ document.getElementById("myLocalDate").defaultValue = "2020-01-02T11:42:42.510"; } </script> </body> </html>
The defaultValue property sets or gets the default value of a local datetime field.
The default value is the value set in the HTML value attribute.
The defaultValue contains the default value, while value contains the current value.
If there are no changes, defaultValue and value is the same.
The defaultValue property accepts and returns a string type value.
String format:
| Value | Description |
|---|---|
YYYY-MM-DDThh:mm:ss.ms Explanation of components: YYYY - year (e.g. 2020) MM - month (e.g. 01 for January) DD - day of the month (e.g. 08) T - a required separator if time is also specified hh - hour (e.g. 22 for 10.00pm) mm - minutes (e.g. 55) ss - seconds (e.g. 03) ms - milliseconds (e.g. 123) |