-

js/boilerplate.js

@@ -48,7 +48,7 @@ window.rkt_bind_evt_ids = function(win_nr, selector, event_kind) {
    try {
      let nodelist = document.querySelectorAll(selector);
      if (nodelist === undefined || nodelist === null) {
-        return 'json:[]';
+        return [];
      }
      let ids = [];
      nodelist.forEach(function(el) { 
@@ -68,9 +68,27 @@ window.rkt_bind_evt_ids = function(win_nr, selector, event_kind) {
          ids.push(info);
        }
     });
-    return 'json:' + JSON.stringify(ids);
+    return ids;
   } catch(e) {
-    return 'json:[]';
+    return [];
   }
 };
 
+window.rkt_with_selector = function(selector, func) {
+     let nodelist = document.querySelectorAll(selector);
+     if (nodelist === undefined || nodelist === null) {
+        return [];
+     }
+     let results = [];
+     let applier = function(el) {
+        let id = el.getAttribute('id');
+        results.push(func(id, el));
+     }
+     nodelist.forEach(applier);
+     let c = results.length;
+     let r = { 'applied-to-elements': c, 'with-ids': results.filter((id) => id !== null) };
+     return r;
+}
+
+
+