fix(l2): allow clearing the core switch row list

web-modules/WecomCenter/views/wecom.center.view.php

@@ -436,10 +436,10 @@ $tab_l2 = '<form method="post" action="'.$save.'" id="wc-l2-form">'
 	.'<div class="wc-grid">'.$collectCard.$displayCard.$networkCard.$coreCard.$colorCard.$latCard.$groupCard.'</div>'
 	.'<div class="wc-actions" style="margin-top:18px"><button class="wc-btn wc-btn--primary" type="submit">'.$t('btn.save').'</button></div>'
 	.'</form>'
-	.'<script>(function(){function wire(addId,boxId,tplId){var add=document.getElementById(addId),box=document.getElementById(boxId),tpl=document.getElementById(tplId);'
+	.'<script>(function(){function wire(addId,boxId,tplId,allowEmpty){var add=document.getElementById(addId),box=document.getElementById(boxId),tpl=document.getElementById(tplId);'
 	.'if(add&&box&&tpl){add.addEventListener("click",function(){var w=document.createElement("div");w.innerHTML=tpl.innerHTML.trim();box.appendChild(w.firstChild);});}'
-	.'if(box){box.addEventListener("click",function(ev){if(ev.target.classList.contains("wc-rule-del")){var r=ev.target.closest(".wc-rule");if(r&&box.querySelectorAll(".wc-rule").length>1){r.remove();}}});}}'
-	.'wire("wc-rule-add","wc-rules","wc-rule-tpl");wire("wc-core-add","wc-cores","wc-core-tpl");'
+	.'if(box){box.addEventListener("click",function(ev){if(ev.target.classList.contains("wc-rule-del")){var r=ev.target.closest(".wc-rule");if(r&&(allowEmpty||box.querySelectorAll(".wc-rule").length>1)){r.remove();}}});}}'
+	.'wire("wc-rule-add","wc-rules","wc-rule-tpl",false);wire("wc-core-add","wc-cores","wc-core-tpl",true);'
 	.'})();</script>';
 
 /* ============================ assemble =============================== */