How To Make Field Required In Jquery

by

There might be cases where you would want to make an input field required in a form based on certain conditions or events. In this blog post, we will show you how to make a field required in jQuery, which is a popular and powerful JavaScript library.

Prerequisites

Before we start, make sure you have the jQuery library included in your project. You can either download it from the official jQuery website or include it directly from a CDN like Google or Microsoft. Here’s the script tag to include it from Google’s CDN:

<script src=”https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js”></script>

Required Attribute in HTML

The HTML5 introduced the required attribute, which can be added to input elements like text, email, password, etc. When this attribute is present, it indicates that the user must fill in a value before submitting the form.

Adding the Required Attribute Using jQuery

Let’s say you have a form with an input field for an email address and a checkbox for newsletter subscription. You want to make the email field required only if the user chooses to subscribe to the newsletter.

First, create your form with the input field and the checkbox:

<form id=”myForm” action=”#” method=”post”>
<label for=”email”>Email:</label>
<input type=”email” name=”email” id=”email”>
<br>
<input type=”checkbox” name=”newsletter” id=”newsletter”>
<label for=”newsletter”>Subscribe to newsletter</label>
<br>
<input type=”submit” value=”Submit”>
</form>

Now, add a jQuery script that adds the required attribute to the email field when the checkbox is checked and removes it when unchecked:

<script>
$(document).ready(function() {
// Listen for the change event on the checkbox
$(“#newsletter”).change(function() {
if (this.checked) {
// If the checkbox is checked, add the required attribute to the email field
$(“#email”).prop(“required”, true);
} else {
// If the checkbox is unchecked, remove the required attribute from the email field
$(“#email”).prop(“required”, false);
}
});
});
</script>

Conclusion

In this blog post, we showed you how to make a field required in jQuery by adding or removing the HTML5 required attribute based on certain conditions. This approach can be easily adapted to various situations, making your forms more dynamic and user-friendly.