Add some fallbacks for scrolling mechanisms

src/core/dom.js

@@ -364,9 +364,12 @@ const get_relative_position = (el, reference_el = document.body) => {
     // the relative position of the target.
     // In case of a scroll container of window, we do not have
     // getBoundingClientRect method, so get the body instead.
-    if (reference_el === window) {
+    if (reference_el === window || document) {
         reference_el = document.body;
     }
+    if (el === window || document) {
+        el = document.body;
+    }
 
     // Calculate absolute [¹] position difference between
     // scroll_container and scroll_target.
@@ -407,6 +410,14 @@ const get_relative_position = (el, reference_el = document.body) => {
  * @param {string} [direction="top"] - The direction to scroll to. Can be either "top", "left" or "both".
  */
 const scroll_to_element = (el, scroll_container, offset = 0, direction = "top") => {
+    // Normalize el and scroll_container
+    if (el === window || document) {
+        el = document.body;
+    }
+    if (scroll_container === window || document) {
+        scroll_container = document.body;
+    }
+
     // Get the position of the element relative to the scroll container.
     const position = get_relative_position(el, scroll_container);
 

src/pat/inject/inject.js

@@ -595,7 +595,8 @@ const inject = {
         ) {
             $title = sources$[sources$.length - 1];
         }
-        cfgs.forEach((cfg, idx1) => {
+
+        for (const [idx1, cfg] of cfgs.entries()) {
             const perform_inject = () => {
                 if (cfg.target !== "none") {
                     for (const target of cfg.$target) {
@@ -615,7 +616,7 @@ const inject = {
             } else {
                 perform_inject();
             }
-        });
+        }
         if (cfgs[0].nextHref && $el.is("a")) {
             // In case next-href is specified the anchor's href will
             // be set to it after the injection is triggered.

src/pat/scroll/scroll.js

@@ -52,12 +52,15 @@ class Pattern extends BasePattern {
             await utils.timeout(this.options.delay);
         }
 
-        const target = this.get_target();
-        const scroll_container = dom.find_scroll_container(
-            target.parentElement,
-            this.options.direction === "top" ? "y" : "x",
-            window
-        );
+        const target = this.get_target() || document.body;
+        const scroll_container =
+            target === document.body
+                ? document.body
+                : dom.find_scroll_container(
+                      target.parentElement,
+                      this.options.direction === "top" ? "y" : "x",
+                      window
+                  );
 
         // Set/remove classes on beginning and end of scroll
         this.el.classList.add("pat-scroll-animated");