How to Check and Uncheck a Checkbox in jQuery

1. Use the prop() Method to Check and Uncheck a Checkbox in jQuery
2. Use the attr() Method to Check and Uncheck a Checkbox in jQuery

There are two ways to check and uncheck a checkbox. For the versions of jQuery above 1.6, the prop() function is used, and for versions below 1.6, the attr() function is used.

Use the prop() Method to Check and Uncheck a Checkbox in jQuery

The prop() method is used to access the input and sets its property. This method manipulates the checked property, fixing it true or false based on whether we want to check or uncheck a checkbox.

Syntax:

$("#checkbox_name").prop("checked", true);

According to the W3C form’s definition, the checked attribute is a boolean attribute, implying that the associated property is actual if the element is present - even if the quality has no value or is set to false.

Example:

$(document).ready(function () {
            $(".clickCheck").click(function () {
                $("#chechId").prop("checked", true);
            });
            $(".clickUncheck").click(function () {
                $("#chechId").prop("checked", false);
            });
        });

Demo Here

clickCheck is the class name of a button Yes whereas clickUncheck is the class name of a button No. Similarly, #chechId is the id name of the checkbox used here, which is used to check and uncheck a checkbox.

Output:

Here, you can see two buttons, i.e., Yes and No. When you click the button Yes it will check the checkbox as it triggers the checkbox property, i.e., true.

Likewise, when you click the button No, it will uncheck the checkbox as it triggers the checkbox property, i.e., false.

Use the attr() Method to Check and Uncheck a Checkbox in jQuery

It is identical to the earlier method but is more appropriate for earlier jQuery versions. The attr() method is used to access the input and sets its properties.

We must change the checked property to true or false depending on what we want to check or uncheck the checkbox.

When changing the attribute to true, it is required to provide a click() method to ensure that the option in the option group is modified.

Syntax:

$("#checkbox_name").attr("checked", true);

Example:

$(document).ready(function() {
                $(".clickCheck").click(function() {
                    $("#chechId").attr("checked", true);
                });

                $(".clickUncheck").click(function() {
                    $("#chechId").attr("checked", false);
                });
            });

Demo Here

The output using the attr() method is the same as that from the prop() method.

Output After Running the Code:

Output After Clicking the Yes Button:

Output After Clicking the No Button: