1 files changed, 62 insertions, 0 deletions
diff --git a/src/static/js/client/quick-description.js b/src/static/js/client/quick-description.js
new file mode 100644
index 00000000..cff82252
--- /dev/null
+++ b/src/static/js/client/quick-description.js
@@ -0,0 +1,62 @@
+/* eslint-env browser */
+
+import {stitchArrays} from '../../shared-util/sugar.js';
+
+export const info = {
+  id: 'quickDescriptionInfo',
+
+  quickDescriptionContainers: null,
+
+  quickDescriptionsAreExpandable: null,
+
+  expandDescriptionLinks: null,
+  collapseDescriptionLinks: null,
+};
+
+export function getPageReferences() {
+  info.quickDescriptionContainers =
+    Array.from(document.querySelectorAll('#content .quick-description'));
+
+  info.quickDescriptionsAreExpandable =
+    info.quickDescriptionContainers
+      .map(container =>
+        container.querySelector('.quick-description-actions.when-expanded'));
+
+  info.expandDescriptionLinks =
+    info.quickDescriptionContainers
+      .map(container =>
+        container.querySelector('.quick-description-actions .expand-link'));
+
+  info.collapseDescriptionLinks =
+    info.quickDescriptionContainers
+      .map(container =>
+        container.querySelector('.quick-description-actions .collapse-link'));
+}
+
+export function addPageListeners() {
+  for (const {
+    isExpandable,
+    container,
+    expandLink,
+    collapseLink,
+  } of stitchArrays({
+    isExpandable: info.quickDescriptionsAreExpandable,
+    container: info.quickDescriptionContainers,
+    expandLink: info.expandDescriptionLinks,
+    collapseLink: info.collapseDescriptionLinks,
+  })) {
+    if (!isExpandable) continue;
+
+    expandLink.addEventListener('click', event => {
+      event.preventDefault();
+      container.classList.add('expanded');
+      container.classList.remove('collapsed');
+    });
+
+    collapseLink.addEventListener('click', event => {
+      event.preventDefault();
+      container.classList.add('collapsed');
+      container.classList.remove('expanded');
+    });
+  }
+}