more fixes. scrolling works, one other test fails for god knows why.

Author: thet

src/core/dom.js

@@ -53,6 +53,9 @@ const toNodeArray = (nodes) => {
 
 
 function ensure_array(obj) {
+    if (typeof obj === "undefined") {
+        return []
+    }
     const is_array = typeof obj[Symbol.iterator] === 'function' && typeof obj !== 'string';
     if (is_array) {
         return [...obj];

src/pat/inject/inject.js

@@ -557,7 +557,7 @@ const inject = {
             // 2) getting the element to scroll to (if not "top")
             const scroll_target = ["top", "target"].includes(cfg.scroll)
                 ? cfg.$target[0]
-                : dom.querySelectorAllAndMe($injected[0], cfg.scroll);
+                : dom.querySelectorAllAndMe($injected, cfg.scroll)[0];
 
             const scroll_container = dom.find_scroll_container(
                 scroll_target,