HTML DOM Input Datetime Required Property

HTML Web Development Front End Technology

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 −

Live Demo

<!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>