Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
HTML DOM Input Date required Property
The HTML DOM Input Date required property determines whether a date input field must be filled before the form can be submitted. This property returns a boolean value indicating the required state and can also be used to set the required attribute dynamically.
Syntax
Following is the syntax for getting the required property value −
inputDateObject.required
Following is the syntax for setting the required property −
inputDateObject.required = booleanValue
Parameters
The booleanValue parameter can be one of the following values −
| Value | Description |
|---|---|
true |
Makes the date field mandatory for form submission. The form will not submit if this field is empty. |
false |
Makes the date field optional. This is the default value. The form can be submitted even if this field is empty. |
Return Value
The property returns a boolean value −
-
true− If the date input field is required -
false− If the date input field is not required (default)
Example − Getting Required Property
Following example demonstrates how to check if a date input field is required −
<!DOCTYPE html>
<html>
<head>
<title>Input Date Required - Get Property</title>
</head>
<body style="font-family: Arial, sans-serif; padding: 20px;">
<h2>Check Date Field Required Status</h2>
<form>
<label for="birthDate">Date of Birth:</label>
<input type="date" id="birthDate" required>
<br><br>
<button type="button" onclick="checkRequired()">Check If Required</button>
</form>
<p id="result"></p>
<script>
function checkRequired() {
var dateInput = document.getElementById("birthDate");
var isRequired = dateInput.required;
document.getElementById("result").textContent =
"Date field is required: " + isRequired;
}
</script>
</body>
</html>
The output shows whether the date field is required −
Date field is required: true
Example − Setting Required Property
Following example demonstrates how to dynamically set the required property of a date input field −
<!DOCTYPE html>
<html>
<head>
<title>Input Date Required - Set Property</title>
</head>
<body style="font-family: Arial, sans-serif; padding: 20px;">
<h2>Toggle Date Field Required Status</h2>
<form>
<label for="eventDate">Event Date:</label>
<input type="date" id="eventDate">
<br><br>
<button type="button" onclick="makeRequired()">Make Required</button>
<button type="button" onclick="makeOptional()">Make Optional</button>
<button type="button" onclick="checkStatus()">Check Status</button>
</form>
<p id="status"></p>
<script>
var dateInput = document.getElementById("eventDate");
function makeRequired() {
dateInput.required = true;
document.getElementById("status").textContent = "Date field is now required";
}
function makeOptional() {
dateInput.required = false;
document.getElementById("status").textContent = "Date field is now optional";
}
function checkStatus() {
var status = dateInput.required ? "required" : "optional";
document.getElementById("status").textContent = "Date field is currently " + status;
}
</script>
</body>
</html>
The buttons allow you to toggle the required status and check the current state of the date field.
Example − Form Validation with Required Date
Following example shows practical form validation using the required property −
<!DOCTYPE html>
<html>
<head>
<title>Date Required Validation</title>
</head>
<body style="font-family: Arial, sans-serif; padding: 20px;">
<h2>User Registration Form</h2>
<form>
<div style="margin-bottom: 10px;">
<label for="fullName">Name: </label>
<input type="text" id="fullName" name="fullName" style="margin-left: 40px;">
</div>
<div style="margin-bottom: 10px;">
<label for="dateSelect">Date of Birth: </label>
<input type="date" id="dateSelect" required>
</div>
<button type="button" onclick="validateForm()">Submit</button>
</form>
<div id="message" style="margin-top: 15px; padding: 10px; border-radius: 4px;"></div>
<script>
function validateForm() {
var dateInput = document.getElementById("dateSelect");
var messageDiv = document.getElementById("message");
if (dateInput.required === true && dateInput.value === '') {
messageDiv.textContent = "Date of Birth is required!";
messageDiv.style.backgroundColor = "#ffebee";
messageDiv.style.color = "#c62828";
} else {
messageDiv.textContent = "Form submitted successfully!";
messageDiv.style.backgroundColor = "#e8f5e8";
messageDiv.style.color = "#2e7d2e";
}
}
</script>
</body>
</html>
The form validates that the required date field is filled before allowing submission. If the date field is empty, an error message is displayed −
Without date: Date of Birth is required! (red message) With date: Form submitted successfully! (green message)
Browser Compatibility
The Input Date required property is supported in all modern browsers that support HTML5 date input fields, including Chrome, Firefox, Safari, and Edge. Internet Explorer 11 and earlier versions do not support the date input type.
Key Points
- The required property can be both read and modified using JavaScript
- When set to
true, browsers will prevent form submission if the date field is empty - The property reflects the presence of the
requiredattribute in the HTML - Form validation occurs automatically when the form is submitted, but you can also check manually using JavaScript
- The required property only affects form submission behavior, not the visual appearance of the field
Conclusion
The HTML DOM Input Date required property provides a simple way to control whether a date input field must be completed before form submission. It returns true if the field is required and false if optional, and can be dynamically modified using JavaScript to implement conditional validation logic.
214 Views
