问题：
执行“ find（）”，排除某些元素及其后代。
实际情况：
代码示例
下面代码的目的是尝试选择$("#lbr_placehld")中的所有元素，但排除所有具有lbr_mval_placehld属性及其后代的元素。
$("#lbr_placehld").find(":not([lbr_mval_placehld])");
HTML示例
<span id="lbr_placehld" lbr_mval_placehld="" lbr_mval_phld_grp_path="mg_bases_n_forms#1">
<div class="form-group">
<label class="col-xs-2 control-label no-padding-right" for="for_str_nm_base">Nome da Base</label>
<div class="col-xs-10">
<div class="clearfix">
<input lbr_mval_fld_nm="str_id_base" name="mg_bases_n_forms#1.str_id_base" type="hidden">
<input class="col-xs-5" lbr_invalidat_msg="" lbr_mval_fld_fdly_nm="Nome da Base" lbr_mval_fld_nm="str_nm_base" name="mg_bases_n_forms#1.str_nm_base" type="text" autocomplete="off" lbr_fdly_nm="Nome da Base 2">
<a href="#" title="Remover este item" class="lbr-tooltip" lbr_mval_op="rmthis" onclick="lbrad_MultivaluedManipulate(this);return false;">
<i class="fa fa-remove red field-border-icon"></i>
</a>
<div lbr_mval_container="" class="widget-box transparent">
<div class="widget-header widget-header-small">
<h6 class="smaller"></h6>
<div class="widget-toolbar">
<a href="#" title="Remover último item" class="lbr-tooltip" lbr_mval_op="rmlast" onclick="lbrad_MultivaluedManipulate(this);return false;" style="display: inline;">
<i class="fa fa-remove red border-icon"></i>
</a>
<a href="#" class="lbr-tooltip" lbr_mval_op="add" onclick="lbrad_MultivaluedManipulate(this);return false;" title="Adicionar item">
<i class="fa fa-plus blue border-icon"></i>
</a>
<a href="#" title="Remover todos itens" class="lbr-tooltip" lbr_mval_op="rmall" onclick="lbrad_MultivaluedManipulate(this);return false;" style="display:none;">
<i class="fa fa-remove red border-icon"></i>
</a>
</div>
</div>
<div class="widget-body">
<div class="widget-main">
<span lbr_mval_grp_path="mg_forms" lbr_mval_last_idx="3">
<div class="form-group">
<label class="col-xs-2 control-label no-padding-right" for="for_str_nm_base">Nome do Form</label>
<div class="col-xs-10">
<div class="clearfix">
<input lbr_mval_fld_nm="str_id_form" name="mg_bases_n_forms#1.str_id_form" type="hidden">
<input class="col-xs-5" lbr_invalidat_msg="" lbr_mval_fld_fdly_nm="Nome do Form" lbr_mval_fld_nm="str_nm_form" name="mg_bases_n_forms#1.str_nm_form" type="text" autocomplete="off" lbr_fdly_nm="Nome do Form 2">
<a href="#" title="Remover este item" class="lbr-tooltip" lbr_mval_op="rmthis" onclick="lbrad_MultivaluedManipulate(this);return false;">
<i class="fa fa-remove red field-border-icon"></i>
</a>
</div>
</div>
</div>
<hr>
</span>
<span lbr_mval_placehld="" lbr_mval_phld_grp_path="mg_forms#0">
<div class="form-group">
<label class="col-xs-2 control-label no-padding-right" for="for_str_nm_base">Nome do Form</label>
<div class="col-xs-10">
<div class="clearfix">
<input lbr_mval_fld_nm="str_id_form" name="mg_forms#0.str_id_form" type="hidden">
<input class="col-xs-5" lbr_invalidat_msg="" lbr_mval_fld_fdly_nm="Nome do Form" lbr_mval_fld_nm="str_nm_form" name="mg_forms#0.str_nm_form" type="text" autocomplete="off" lbr_fdly_nm="Nome do Form 1">
<a href="#" title="Remover este item" class="lbr-tooltip" lbr_mval_op="rmthis" onclick="lbrad_MultivaluedManipulate(this);return false;">
<i class="fa fa-remove red field-border-icon"></i>
</a>
</div>
</div>
</div>
<hr>
</span>
<span lbr_mval_placehld="" lbr_mval_phld_grp_path="mg_forms#1">
<div class="form-group">
<label class="col-xs-2 control-label no-padding-right" for="for_str_nm_base">Nome do Form</label>
<div class="col-xs-10">
<div class="clearfix">
<input lbr_mval_fld_nm="str_id_form" name="mg_forms#1.str_id_form" type="hidden">
<input class="col-xs-5" lbr_invalidat_msg="" lbr_mval_fld_fdly_nm="Nome do Form" lbr_mval_fld_nm="str_nm_form" name="mg_forms#1.str_nm_form" type="text" autocomplete="off" lbr_fdly_nm="Nome do Form 2">
<a href="#" title="Remover este item" class="lbr-tooltip" lbr_mval_op="rmthis" onclick="lbrad_MultivaluedManipulate(this);return false;">
<i class="fa fa-remove red field-border-icon"></i>
</a>
</div>
</div>
</div>
<hr>
</span>
<span lbr_mval_placehld="" lbr_mval_phld_grp_path="mg_forms#2">
<div class="form-group">
<label class="col-xs-2 control-label no-padding-right" for="for_str_nm_base">Nome do Form</label>
<div class="col-xs-10">
<div class="clearfix">
<input lbr_mval_fld_nm="str_id_form" name="mg_forms#2.str_id_form" type="hidden">
<input class="col-xs-5" lbr_invalidat_msg="" lbr_mval_fld_fdly_nm="Nome do Form" lbr_mval_fld_nm="str_nm_form" name="mg_forms#2.str_nm_form" type="text" autocomplete="off" lbr_fdly_nm="Nome do Form 3">
<a href="#" title="Remover este item" class="lbr-tooltip" lbr_mval_op="rmthis" onclick="lbrad_MultivaluedManipulate(this);return false;">
<i class="fa fa-remove red field-border-icon"></i>
</a>
</div>
</div>
</div>
<hr>
</span>
<span lbr_mval_placehld="" lbr_mval_phld_grp_path="mg_forms#3">
<div class="form-group">
<label class="col-xs-2 control-label no-padding-right" for="for_str_nm_base">Nome do Form</label>
<div class="col-xs-10">
<div class="clearfix">
<input lbr_mval_fld_nm="str_id_form" name="mg_forms#3.str_id_form" type="hidden">
<input class="col-xs-5" lbr_invalidat_msg="" lbr_mval_fld_fdly_nm="Nome do Form" lbr_mval_fld_nm="str_nm_form" name="mg_forms#3.str_nm_form" type="text" autocomplete="off" lbr_fdly_nm="Nome do Form 4">
<a href="#" title="Remover este item" class="lbr-tooltip" lbr_mval_op="rmthis" onclick="lbrad_MultivaluedManipulate(this);return false;">
<i class="fa fa-remove red field-border-icon"></i>
</a>
</div>
</div>
</div>
<hr>
</span>
</div>
</div>
</div>
</div>
</div>
</div>
<hr>
</span>
var $topElement = $("#lbr_placehld");
// find every nested element
$topElement.find('*')
// filter out any element that has the attribute,
// or is a descendant of an element that has the attribute.
// EXCLUDE the top element from the attribute check
.filter(function(){
return $(this).closest('[lbr_mval_placehld]').not($topElement).length === 0;
});