app/assets/javascripts/abuse_reports.js.es6

+/* eslint-disable */
+((global) => {
+  const MAX_MESSAGE_LENGTH = 500;
+  const MESSAGE_CELL_SELECTOR = '.abuse-reports .message';
+
+  class AbuseReports {
+    constructor() {
+      $(MESSAGE_CELL_SELECTOR).each(this.truncateLongMessage);
+      $(document)
+        .off('click', MESSAGE_CELL_SELECTOR)
+        .on('click', MESSAGE_CELL_SELECTOR, this.toggleMessageTruncation);
+    }
+
+    truncateLongMessage() {
+      const $messageCellElement = $(this);
+      const reportMessage = $messageCellElement.text();
+      if (reportMessage.length > MAX_MESSAGE_LENGTH) {
+        $messageCellElement.data('original-message', reportMessage);
+        $messageCellElement.data('message-truncated', 'true');
+        $messageCellElement.text(global.text.truncate(reportMessage, MAX_MESSAGE_LENGTH));
+      }
+    }
+
+    toggleMessageTruncation() {
+      const $messageCellElement = $(this);
+      const originalMessage = $messageCellElement.data('original-message');
+      if (!originalMessage) return;
+      if ($messageCellElement.data('message-truncated') === 'true') {
+        $messageCellElement.data('message-truncated', 'false');
+        $messageCellElement.text(originalMessage);
+      } else {
+        $messageCellElement.data('message-truncated', 'true');
+        $messageCellElement.text(`${originalMessage.substr(0, (MAX_MESSAGE_LENGTH - 3))}...`);
+      }
+    }
+  }
+
+  global.AbuseReports = AbuseReports;
+})(window.gl || (window.gl = {}));

app/assets/javascripts/activities.js.coffee

-class Activities
-  constructor: ->
-    Pager.init 20, true
-    $(".event_filter_link").bind "click", (event) =>
-      event.preventDefault()
-      @toggleFilter($(event.currentTarget))
-      @reloadActivities()
-
-  reloadActivities: ->
-    $(".content_list").html ''
-    Pager.init 20, true
-
-
-  toggleFilter: (sender) ->
-    sender.parent().toggleClass "inactive"
-    event_filters = $.cookie("event_filter")
-    filter = sender.attr("id").split("_")[0]
-    if event_filters
-      event_filters = event_filters.split(",")
-    else
-      event_filters = new Array()
-
-    index = event_filters.indexOf(filter)
-    if index is -1
-      event_filters.push filter
-    else
-      event_filters.splice index, 1
-
-    $.cookie "event_filter", event_filters.join(","), { path: '/' }
-
-@Activities = Activities