检查是否选中了复选框？

Question

How can I check if a checkbox is checked via jQuery?

Can I just add an ID or class to the element and do this?

if($('#element').val() == 1) { 
  //do stuff 
}

Answer 1

if($('#element').is(':checked')){

    //checkbox is checked

}

或者

if($('#element:checked').length > 0){

    //checkbox is checked

}

或在 jQuery 1.6+ 中：

if($('#element:checked').prop('checked') === true){

    //checkbox is checked

}