JSFiddle - React, Tailwind, and code Playground

HTML

<table id="tbl_get_item">
    <tbody>
       
        <tr>
        <td><input type="checkbox">
            <td width="20%">
                Numar:
            </td>
            <td style="text-align:center" class="unit-item hidden">
                1
            </td>
            <td style="text-align:center" class="unit-item hidden">
                2
            </td>
            <td style="text-align:center" class="unit-item hidden">
                3
            </td>
            <td style="text-align:center" class="unit-item hidden">
                4
            </td>
            <td style="text-align:center" class="unit-item hidden">
                5
            </td>
          
        <tr>
            <td align="left" width="20%">
                Pierderi:
            </td>
            <td style="text-align:center" class="unit-item hidden">
                11
            </td>
            <td style="text-align:center" class="unit-item hidden">
                12
            </td>
            <td style="text-align:center" class="unit-item hidden">
                13
            </td>
            <td style="text-align:center" class="unit-item hidden">
                14
            </td>
            <td style="text-align:center" class="unit-item hidden">
               15
            </td>
           
          
        </tr>
    </tbody>
</table>

<input type="button" value="ok" id="b">

JavaScript

var arrone = [];
var arrtwo = [];
var table = document.getElementById('tbl_get_item');
 $('input:checkbox:checked', table).each(function() {
$("table tr").each(function(i) {
    $(this).find('td.unit-item').each(function() {
        //console.log(i);
        i == 1 ? arrone.push($.trim($(this).text())) : arrtwo.push($.trim($(this).text()));
    })
})
})
//console.log(arrone.join(','));
//console.log(arrtwo.join(','));
//$("#b").on("click",function(){
alert(arrone)
//})