问为什么我会因为这个Javascript函数而失去边距

EN

  <div class="form-control mb-2" id="fieldsCompleteness" name="fieldsCompleteness">                                
  <span class="badge badge-secondary">
      Acoustic
  </span>
  <span class="badge badge-secondary">
      Album
  </span>
  <span class="badge badge-secondary">
      Sort Album Artist
  </span>
  </div>

function getSelectValues(select, readonlylist)
{                             
      var result = '';
    var options = select && select.options;
    var opt;

    for (var i=0, iLen=options.length; i<iLen; i++)
    {
        opt = options[i];
        if (opt.selected)
        {
            result+='<span class="badge badge-secondary">' + opt.text + '</span>';
        }
    }
    readonlylist.innerHTML =result;
    return result;
}