Check if at least one checkbox is checked using jQuery

Question

I have five checkboxes. Using jQuery, how do I check if at least one of them is checked?

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Answer 1

is() can do this, and is arguably the only acceptable use of is(":checked"):

From the jQuery docs, http://api.jquery.com/is/:

Check the current matched set of elements against a selector, element, or jQuery object and return true if at least one of these elements matches the given arguments.

alert($("input[name='service[]']").is(":checked"));

Example: http://jsfiddle.net/AndyE/bytVX/1/ (based on the fiddle by Brandon Gano)

Alternatively, and potentially faster, you can pass a function to is():

$("input[name='service[]']").is(function () {
    return this.checked;
});