1 files changed, 22 insertions, 1 deletions
diff --git a/app/assets/javascripts/lib/utils/sticky.js b/app/assets/javascripts/lib/utils/sticky.js
index 098afcfa1b4..15a4dd62012 100644
--- a/app/assets/javascripts/lib/utils/sticky.js
+++ b/app/assets/javascripts/lib/utils/sticky.js
@@ -1,3 +1,5 @@
+import StickyFill from 'stickyfilljs';
+
 export const createPlaceholder = () => {
   const placeholder = document.createElement('div');
   placeholder.classList.add('sticky-placeholder');
@@ -28,7 +30,16 @@ export const isSticky = (el, scrollY, stickyTop, insertPlaceholder) => {
   }
 };
 
-export default (el, stickyTop, insertPlaceholder = true) => {
+/**
+ * Create a listener that will toggle a 'is-stuck' class, based on the current scroll position.
+ *
+ * - If the current environment does not support `position: sticky`, do nothing.
+ *
+ * @param {HTMLElement} el The `position: sticky` element.
+ * @param {Number} stickyTop Used to determine when an element is stuck.
+ * @param {Boolean} insertPlaceholder Should a placeholder element be created when element is stuck?
+ */
+export const stickyMonitor = (el, stickyTop, insertPlaceholder = true) => {
   if (!el) return;
 
   if (typeof CSS === 'undefined' || !(CSS.supports('(position: -webkit-sticky) or (position: sticky)'))) return;
@@ -37,3 +48,13 @@ export default (el, stickyTop, insertPlaceholder = true) => {
     passive: true,
   });
 };
+
+/**
+ * Polyfill the `position: sticky` behavior.
+ *
+ * - If the current environment supports `position: sticky`, do nothing.
+ * - Can receive an iterable element list (NodeList, jQuery collection, etc.) or single HTMLElement.
+ */
+export const polyfillSticky = (el) => {
+  StickyFill.add(el);
+};