How do I move children elements to a new parent element in jQuery?

Question

I have a list of submenus and I want to move each 4 child <li></li> to a new parent <ul></ul> separately

<ul class="sub_menu">
    <li>Menu 1</li>
    <li>Menu 2</li>
    <li>Menu 3</li>
    <li>Menu 4</li>
    <li>Menu 5</li>
    <li>Menu 6</li>
    <li>Menu 7</li>
    <li>Menu 8</li>
</ul>

<div class="container_row">
    <div class="row">

        <div class="col1 col_3">
            <div class="wrap">
                <ul>

                </ul>
            </div>
        </div>

        <div class="col1 col_3">
            <div class="wrap">
                <ul>

                </ul>
            </div>
        </div>

    </div>
</div>

The final output that I am looking for is written below:

<div class="container_row">
    <div class="row">

        <div class="col1 col_3">
            <div class="wrap">
                <ul>
                    <li>Menu 1</li>
                    <li>Menu 2</li>
                    <li>Menu 3</li>
                    <li>Menu 4</li>
                </ul>
            </div>
        </div>

        <div class="col1 col_3">
            <div class="wrap">
                <ul>
                    <li>Menu 5</li>
                    <li>Menu 6</li>
                    <li>Menu 7</li>
                    <li>Menu 8</li>
                </ul>
            </div>
        </div>

    </div>
</div>

The code I've tried so far is

$(document).ready(function() {
    $(".container_row .wrap ul").append($(".sub_menu li"));
});

Do you have any idea how to achieve the final output?

Answer 1

This is kind of what you are trying to do I think.

$('ul.sub_menu li').each(function (i) {
  const index = Math.trunc(i / 4);
  $(this).detach().appendTo($('div.wrap ul').get(index));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="sub_menu">
    <li>Menu 1</li>
    <li>Menu 2</li>
    <li>Menu 3</li>
    <li>Menu 4</li>
    <li>Menu 5</li>
    <li>Menu 6</li>
    <li>Menu 7</li>
    <li>Menu 8</li>
</ul>

<div class="container_row">
    <div class="row">
        <div class="col1 col_3">
            <div class="wrap">
                <ul></ul>
            </div>
        </div>
        <div class="col1 col_3">
            <div class="wrap">
                <ul></ul>
            </div>
        </div>
    </div>
</div>

Answer 2

You can set id for div and use each method like this

$(document).ready(function() {
    var length = $(".sub_menu li").length;
    //console.log(length)
    $(".sub_menu li").each(function(index, item){
    if(index < length/2){
        $("#first ul").append(item);
        //console.log($(".container_row .wrap ul:nth-child(0)").length)
    }else{
       $("#second ul").append(item);
       //console.log(index)
    }
    })
    
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="sub_menu">
    <li>Menu 1</li>
    <li>Menu 2</li>
    <li>Menu 3</li>
    <li>Menu 4</li>
    <li>Menu 5</li>
    <li>Menu 6</li>
    <li>Menu 7</li>
    <li>Menu 8</li>
</ul>

<div class="container_row">
    <div class="row">

        <div class="col1 col_3">
            <div class="wrap" id="first">
                <ul>

                </ul>
            </div>
        </div>

        <div class="col1 col_3">
            <div class="wrap" id="second">
                <ul>

                </ul>
            </div>
        </div>

    </div>
</div>