Selector checked
The selector :checked selects elements that are selected, that is, those that have the attributes checked or selected. The :checked selector works with checkboxes (checkbox) and radio buttons (radio), as well as for elements with the option tag. To get only the selected options of select elements, use the selected selector.
Syntax
This is how we select elements with the checked attribute:
$(':checked');
Example
Let's display the number of selected checkboxes each time you select a checkbox. As you can see, before your first click, the default checkboxes will be displayed, which are the second and fourth:
<form>
<p>
<input type="checkbox" name="cbox" value="one">
<input type="checkbox" name="cbox" value="two" checked="checked">
<input type="checkbox" name="cbox" value="three">
<input type="checkbox" name="cbox" value="four" checked>
<input type="checkbox" name="cbox" value="five">
</p>
</form>
<div></div>
div {
color: green;
}
let countChecked = function() {
let n = $('input:checked').length;
$('div').text('Checked: ' + n);
};
countChecked();
$('input[type=checkbox]').on('click', countChecked);
Example
Let's display the value of each selected radio switch below on click:
<form>
<div>
<input type="radio" name="digits" value="one" id="one">
<label for="one">one</label>
</div>
<div>
<input type="radio" name="digits" value="two" id="two">
<label for="two">two</label>
</div>
<div>
<input type="radio" name="digits" value="three" id="three">
<label for="three">three</label>
</div>
<div id="text"></div>
</form>
input, label {
line-height: 1.5em;
}
$('input').on('click', function() {
$('#text').html($('input:checked').val() + ' is checked!');
});
