JavaScript this.checked

Question

In JavaScript, if we write the following for example:

var c = this.checked;

What is checked here? Is it just a state

Answer 1

In jQuery checked is a selector:

The :checked selector works for checkboxes and radio buttons.

There are some ways to check if a checkbox is checked or not:

For Example:

$('#checkBox').attr('checked'); 

or 

$('#checkBox').is(':checked');