The HTML DOM Input Datetime required property determines whether Input Datetime is compulsory to set or not.
Syntax
Following is the syntax −
- Returning boolean value - true/false
inputDatetimeObject.required
- Setting required to booleanValue
inputDatetimeObject.required = booleanValue
Boolean Values
Here, “booleanValue” can be the following −
booleanValue | Details |
---|---|
true | It defines that it is compulsory to set the datetime field to submit form. |
false | It is the default value and to set datetime field is not compulsory. |
Example
Let us see an example of Input Datetime required property −
<!DOCTYPE html> <html> <head> <title>Input Datetime required</title> </head> <body> <form> Final Exam Datetime: <input type="datetime" id="datetimeSelect" value="" required> </form> <button onclick="finalizeDatetime()">Confirm Datetime</button> <div id="divDisplay"></div> <script> var divDisplay = document.getElementById("divDisplay"); var inputDatetime = document.getElementById("datetimeSelect"); divDisplay.textContent = 'Exam Datetime Required: '+inputDatetime.required; function finalizeDatetime() { if(inputDatetime.value === '') divDisplay.textContent += ', Give a valid Exam Datetime. '; else divDisplay.textContent = 'Final Exam Datetime: '+inputDatetime.value } </script> </body> </html>
Output
This will produce the following output −
Clicking ‘Confirm Datetime’ button −
After clicking ‘Confirm Datetime’ button with value of datetime field set −