强制的。map示例:

var checkedVals = $('.theClass:checkbox:checked').map(function() {
    return this.value;
}).get();
alert(checkedVals.join(","));

$("input[name='<your_name_of_selected_group_checkboxes>']:checked").val()

$('input.yourClass:checkbox:checked').each(function () {
    var sThisVal = $(this).val();
});

这将获得类名为“yourClass”的所有复选框。我喜欢这个例子，因为它使用jQuery选择器检查，而不是做条件检查。就我个人而言，我也会使用数组来存储值，然后根据需要使用它们，比如:

var arr = [];
$('input.yourClass:checkbox:checked').each(function () {
    arr.push($(this).val());
});

<input type="checkbox" id="Checkbox1" class = "chk" value = "1" />
<input type="checkbox" id="Checkbox2" class = "chk" value = "2" />
<input type="checkbox" id="Checkbox3" class = "chk" value = "3" />
<input type="checkbox" id="Checkbox4" class = "chk" value = "4" />
<input type="button" id="demo" value = "Demo" />

<script type = "text/javascript" src = "http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.6.1.min.js"></script>
<script type="text/javascript">
    $("#demo").live("click", function () {
        $("input:checkbox[class=chk]:checked").each(function () {
            alert("Id: " + $(this).attr("id") + " Value: " + $(this).val());
        });
    });
</script>

http://www.jqueryfaqs.com/Articles/Get-values-of-all-checked-checkboxes-by-class-name-using-jQuery.aspx

如果只有复选框具有给定的类名，则不需要指定:checkbox筛选器。

const newArray = $('.yourClass:checked').map(function(){return $(this).val()}).get();
console.log(newArray);

$("input:checked.yourClassName").each(function(){
   console.log($(this).val());
});

这也是工作。