I work

HTML(The HTML part is generated via a JSON, this is just the template.) :

<table id="table-blog" class="order-table table table-hover">
   <thead>
      <tr>
         <th>Title</th>
         <th>Description</th>
         <th>Tags</th>
         <th>Url</th>
         <th>Active</th>
      </tr>
   </thead>
   <tbody>
      <tr>
          <td>Title</td>
          <td>Description</td>
          <td>Tags</td>
          <td>Url</td>
         <td><input type="checkbox"></td>
      </tr>
      <tr>
        <td>Title</td>
        <td>Description</td>
        <td>Tags</td>
        <td>Url</td>
       <td><input type="checkbox"></td>
    </tr>
    <tr>
        <td>Title</td>
        <td>Description</td>
        <td>Tags</td>
        <td>Url</td>
       <td><input type="checkbox"></td>
    </tr>
   </tbody>
</table>

Here the JS :

function syncBlog(blogs)
  {
    blogs = Object.values(blogs);
   
    var tbody =  $("#table-blog > tbody");
      console.log($(tbody).children());
    $(tbody).children().each(function(){
      $(this).children('td:last-child').children("input").prop("checked", false);
    });
    
    if(blogs.length > 0)
    {
      blogs.forEach(blog => 
      {
        $(tbody).children().each(function(){
          console.log($(this));
          if($(this).children('td:first').text() == blog.title)
          {
            console.log(blogs);
            $(this).children('td:last-child').children("input").prop("checked", true);
          }
        });
      });
    }
  }

I don't why .children() returns nothing, however the table is filled before (by ajax call).

But if I try with native JS :

var tbody =  document.querySelector("#table-blog > tbody");
console.log(tbody.children);

I will be able to see the HTMLCollection with all <tr>, but I can't use them and .length return me 0