HTML | DOM Input Datetime required Property
The Input Datetime required property is used to check whether a datetime field must be filled out or not before submitting a form.
Syntax:
- For returning the required property:
datetimeObject.required
- For setting the required property:
datetimeObject.required = true|false
Property Value:
- true|false : It is used to specify whether a datetime field should be a required part of a form submission or not. It is false by default.
Return Values: It returns a Boolean value which represents that the input Datetime field is required or not.
Below program illustrates the Datetime required property :
Example 1: Finding out if a datetime field must be filled out before submitting a form or not.
html
<!DOCTYPE html> < html > < head > < title >Input Datetime required Property in HTML</ title > < style > h1 { color: green; } h2 { font-family: Impact; } body { text-align: center; } </ style > </ head > < body > < h1 >w3wiki</ h1 > < h2 >Input Datetime required Property</ h2 > < br > < form action = "/initials.php" > Date of Birth: < input type = "datetime" id = "Test_Datetime" name = "DOB" required> < input type = "submit" > </ form > < p >To find out if the datetime field must be filled out before submitting the form, double-click the "Check" button.</ p > < button ondblclick = "My_Datetime()" >Check</ button > < p id = "test" ></ p > < script > function My_Datetime() { var d = document.getElementById("Test_Datetime").required; document.getElementById("test").innerHTML = d; } </ script > </ body > </ html > |
Output:
Before:
After clicking the button:
Example 2: Setting the value of the required attribute
HTML
<!DOCTYPE html> < html > < head > < title >Input Datetime required Property in HTML</ title > < style > h1 { color: green; } h2 { font-family: Impact; } body { text-align: center; } </ style > </ head > < body > < h1 >w3wiki</ h1 > < h2 >Input Datetime required Property</ h2 > < br > < form action = "/initials.php" > Date of Birth: < input type = "datetime" id = "Test_Datetime" name = "DOB" required> < input type = "submit" > </ form > < p >To set the autofocus property, double-click the "set" button.</ p > < button ondblclick = "My_Datetime()" >Setk</ button > < p id = "test" ></ p > < script > function My_Datetime() { var d = document.getElementById("Test_Datetime").required = "false"; document.getElementById("test").innerHTML = "The value of the required attribute was changed to:" + d; } </ script > </ body > </ html > |
Output:
Before:
After clicking the button:
Note: The <input type=”datetime”> element does not show any datetime field/calendar in any major browsers, except Safari.
Supported Web Browsers
- Apple Safari
- Internet Explorer
- Firefox
- Google Chrome
- Opera
Contact Us