diff --git a/ags/widget/BackgroundWindow.ts b/ags/widget/BackgroundWindow.ts
new file mode 100644
index 0000000..62bf184
--- /dev/null
+++ b/ags/widget/BackgroundWindow.ts
@@ -0,0 +1,30 @@
+import { Astal, Gdk, Widget } from "astal/gtk3";
+
+const { TOP, LEFT, RIGHT, BOTTOM } = Astal.WindowAnchor;
+
+/** Creates a fullscreen GtkWindow that is used for making
+ * the user focus on the content after this window(e.g.: AskPopup,
+ * Authentication Window...)
+ *
+ * @param css Custom stylesheet used in the window. defaults to setting `background-color` to rgba(0, 0, 0, .2)
+ * @param onClick Function that is called when the user clicks on the window
+ * @returns the generated background window
+ */
+export function BackgroundWindow(css?: (string | null), onClickPrimary?: (((window: Widget.Window) => void) | null),
+                                onClickSecondary?: (((window: Widget.Window) => void) | null)): Widget.Window {
+    return new Widget.Window({
+        namespace: "background-window",
+        css: css ?? "background: rgba(0, 0, 0, .2);",
+        anchor: TOP | LEFT | BOTTOM | RIGHT,
+        exclusivity: Astal.Exclusivity.IGNORE,
+        onButtonPressEvent: (window, event: Gdk.Event) => {
+            if(event.get_button()[1] === Gdk.BUTTON_PRIMARY) {
+                onClickPrimary?.(window);
+                return;
+            }
+
+            if(event.get_button()[1] === Gdk.BUTTON_SECONDARY) 
+                onClickSecondary?.(window);
+        }
+    } as Widget.WindowProps);
+}