Two ways to obtain the selected state of a checkbox

There are two ways to get the checked status of a checkbox:

1. Retrieve a reference to the checkbox element using the document.getElementById() method.
2. We can use the checkbox.checked property to determine if the checkbox is checked. If the checkbox is checked, the value of this property will be true; otherwise, it will be false.

var checkbox = document.getElementById('myCheckbox');
if (checkbox.checked) {
    // checkbox被选中
} else {
    // checkbox未被选中
}

1. Select the checkbox element using a selector.
2. Use the prop() method in jQuery to get the checked status of a checkbox. If the checkbox is checked, the method will return true; otherwise it will return false.

if ($('#myCheckbox').prop('checked')) {
    // checkbox被选中
} else {
    // checkbox未被选中
}

Regardless of the method used, you first need to obtain a reference to the checkbox element, and then use the checked property or the prop() method to get its checked status.