Add Hide sticky elements

Hide sticky elements.user.js

@@ -0,0 +1,54 @@
+// ==UserScript==
+// @name        Hide sticky elements
+// @namespace   blankie-scripts
+// @match       http*://*/*
+// @grant       GM_registerMenuCommand
+// @grant       GM_unregisterMenuCommand
+// @version     1.0.0
+// @author      blankie
+// @description Adds a button to the monkey menu to hide sticky elements
+// @inject-into content
+// ==/UserScript==
+
+"use strict";
+
+let stickyElements = [];
+let hideStickyElements = true;
+let menuId;
+
+function hideAllStickyElements() {
+    for (let element of document.body.querySelectorAll("*")) {
+        let style = getComputedStyle(element);
+        if (style.position !== "sticky" && style.position !== "fixed") {
+            continue;
+        }
+
+        let originalDisplayValue = element.style.getPropertyValue("display");
+        let originalDisplayPriority = element.style.getPropertyPriority("display");
+        element.style.setProperty("display", "none", "important");
+        stickyElements.push([element, originalDisplayValue, originalDisplayPriority]);
+    }
+}
+
+function unhideAllStickyElements() {
+    for (let [element, originalDisplayValue, originalDisplayPriority] of stickyElements) {
+        element.style.setProperty("display", originalDisplayValue, originalDisplayPriority);
+    }
+    stickyElements = [];
+}
+
+
+
+function registerMenu() {
+    if (menuId) {
+        GM_unregisterMenuCommand(menuId);
+    }
+
+    let caption = hideStickyElements ? "Hide sticky elements" : "Unhide sticky elements";
+    menuId = GM_registerMenuCommand(caption, function() {
+        (hideStickyElements ? hideAllStickyElements : unhideAllStickyElements)();
+        hideStickyElements = !hideStickyElements;
+        registerMenu();
+    });
+}
+registerMenu();

README.md

@@ -50,6 +50,11 @@ A userscript that adds small but useful features for Compass. Features include:
 A userscript that adds a "Show elements popup" option to the Monkey Menu which
 lists all elements with an ID
 
+## Hide sticky elements
+
+A userscript that adds a button to the monkey menu to hide and unhide sticky
+elements
+
 ## Image Loader Placeholder Remover
 
 Removes image loading placeholders from images loaded via Javascript, such as