How to iterate through only the first div JavaScript

Question

I have the following HTML,

<div class="col-lg-7 col-md-6 col-sm-6 text-left">
    <a href="javascript:;" class="multiSelect active" id="lbAssistingStaff" title="Evelyn Lupardus, Jamison Hennigan, Kajal Jain, Milud De Silvaa"><span style="width: 252px;">Evelyn Lupardus, Jamison Hennigan, Kajal Jain, Milud De Silvaa</span></a>
    <div class="multiSelectOptions" style="position: absolute; z-index: 99999; visibility: visible; height: 150px; width: 259px; top: 30px; left: 15px;">
        <label class="selectAll">
            <input type="checkbox" class="selectAll">Select All</label>
        <label class="">
            <input type="checkbox" name="lbAssistingStaff[]" value="10307">Dovie Segerson</label>
        <label class="checked">
            <input type="checkbox" name="lbAssistingStaff[]" value="14172">Kajal Jain</label>
        <label>
            <input type="checkbox" name="lbAssistingStaff[]" value="10354">Lydia Nikocevic</label>
        <label class="checked">
            <input type="checkbox" name="lbAssistingStaff[]" value="10355">Margo Mondloch</label>
    </div>
    <div class="multiSelectOptions" style="position: absolute; z-index: 99999; visibility: visible; height: 150px; width: 259px;">
        <label class="selectAll">
            <input type="checkbox" class="selectAll">Select All</label>
        <label>
            <input type="checkbox" name="lbAssistingStaff[]" value="10307">Dovie Segerson</label>
        <label class="checked">
            <input type="checkbox" name="lbAssistingStaff[]" value="14172">Kajal Jain</label>
    </div>
    <div class="multiSelectOptions" style="position: absolute; z-index: 99999; visibility: visible; width: 259px;">
        <label class="selectAll">
            <input type="checkbox" class="selectAll">Select All</label>
        <label class="checked">
            <input type="checkbox" name="lbAssistingStaff[]" value="14172">Kajal Jain</label>
        <label>
            <input type="checkbox" name="lbAssistingStaff[]" value="10062">Nevada Morison</label>
    </div>
    <div class="multiSelectOptions" style="position: absolute; z-index: 99999; visibility: visible; height: 150px; width: 412px;">
        <label class="selectAll">
            <input type="checkbox" class="selectAll">Select All</label>
        <label>
            <input type="checkbox" name="lbAssistingStaff[]" value="10259">Abel Schear</label>
        <label class="checked">
            <input type="checkbox" name="lbAssistingStaff[]" value="10405">Adam Sandling</label>
        <label>
            <input type="checkbox" name="lbAssistingStaff[]" value="10400">Alta Barba</label>
        <label class="checked">
            <input type="checkbox" name="lbAssistingStaff[]" value="16224">amali silva</label>
    </div>
    <input type="hidden" name="ctl00$ContentPlaceHolder1$ctlViewFilters$hndAssistingStaff" id="hndAssistingStaff" value="10276,10352,14172,14177,10276,10352,14172,10276,10352,14172,14172,14172,14172,14172,10276,10352,14172,10276,10352,14172">
</div>

which generates through the JQuery multi-select.There are separate divs with the same class name called class="multiSelectOptions" . Now I need to push all the checked options values to Array in only inside the first Div(top Div).which mean this,

<div class="multiSelectOptions" style="position: absolute; z-index: 99999; visibility: visible; height: 150px; width: 259px; top: 30px; left: 15px;">
    <label class="selectAll">
        <input type="checkbox" class="selectAll">Select All</label>
    <label class="">
        <input type="checkbox" name="lbAssistingStaff[]" value="10307">Dovie Segerson</label>
    <label class="checked">
        <input type="checkbox" name="lbAssistingStaff[]" value="14172">Kajal Jain</label>
    <label>
        <input type="checkbox" name="lbAssistingStaff[]" value="10354">Lydia Nikocevic</label>
    <label class="checked">
        <input type="checkbox" name="lbAssistingStaff[]" value="10355">Margo Mondloch</label>
</div>

I tried this,

$("#lbAssistingStaff").next("div").click(function (e) {
    var listboxID = "lbAssistingStaff";
    var selectedItemIDs = [];
    $('input[name="' + listboxID + '\[\]"]:checked').each(function () {
        selectedItemIDs.push($(this).val());
    });
});

But this iterate through all the div's name="lbAssistingStaff[]" , According to my requirement array should have these two values ( 14172,10355 ) only.

Answer 1

Provide the context.

$('input[name="' + listboxID + '\[\]"]:checked', this)

This will apply the selector against the this which is the div you clicked.

Answer 2

Use find within $(this) :

$("#lbAssistingStaff").next("div").click(function (e) {
    var listboxID = "lbAssistingStaff";
    var selectedItemIDs = [];
    $(this).find('input[name="' + listboxID + '\[\]"]:checked').each(function () {
    // ^^^^^^^^^
        selectedItemIDs.push($(this).val());
    });
});

---

Side note: jQuery offers a map function you can use instead of creating the array and then pushing to it:

var selectedItemIDs = $(this).find('input[name="' + listboxID + '\[\]"]:checked').map(function () {
    return this.value; // No need to wrap it just to get the value
}).get();

Don't forget the .get() at the end, or you'll get a jQuery object instead of a true array.