jQuery HTML

jQuery

checkbox

Is it checked

$('#myCheckbox').is(':checked')

For jQuery 1.6+ :

.attr() is deprecated for properties; use the new .prop() function instead as:

$('#myCheckbox').prop('checked', true); // Checks it
$('#myCheckbox').prop('checked', false); // Unchecks it

For jQuery < 1.6:

To check/uncheck a checkbox, use the attribute checked and alter that. With jQuery you can do:

$('#myCheckbox').attr('checked', true); // Checks it
$('#myCheckbox').attr('checked', false); // Unchecks it

Cause you know, in HTML, it would look something like:

<input type="checkbox" id="myCheckbox" checked="checked" /> <!-- Checked -->
<input type="checkbox" id="myCheckbox" /> <!-- Unchecked -->

However, you cannot trust the .attr() method to get the value of the checkbox (if you need to). You will have to rely in the .prop() method. ¹

Bootstrap

modal

Prevent Bootstrap Modal from disappearing when clicking outside or pressing escape? ²

$('#myModal').modal({
    backdrop: 'static',
    keyboard: false
})

and in HTML:

<a data-controls-modal="your_div_id" data-backdrop="static" data-keyboard="false" href="#">