How do I check whether a checkbox is checked in jQuery?

Question

I need to check the checked property of a checkbox and perform an action based on the checked property using jQuery.

For example, if the age checkbox is

Answer 1

This is some different method to do the same thing:

$(document).ready(function (){

    $('#isAgeSelected').click(function() {
        // $("#txtAge").toggle(this.checked);

        // Using a pure CSS selector
        if ($(this.checked)) {
            alert('on check 1');
        };

        // Using jQuery's is() method
        if ($(this).is(':checked')) {
            alert('on checked 2');
        };

        //  // Using jQuery's filter() method
        if ($(this).filter(':checked')) {
            alert('on checked 3');
        };
    });
});

Age is something