diff --git a/.eslintrc.json b/.eslintrc.json
index a45de2f664..5f3ccc170a 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -61,6 +61,7 @@
         "emoji_picker": false,
         "favicon": false,
         "feature_flags": false,
+        "feedback_widget": false,
         "fenced_code": false,
         "flatpickr": false,
         "floating_recipient_bar": false,
diff --git a/static/js/bundles/app.js b/static/js/bundles/app.js
index 07dc082404..e39429dce4 100644
--- a/static/js/bundles/app.js
+++ b/static/js/bundles/app.js
@@ -40,6 +40,7 @@ import "js/rtl.js";
 import "js/dict.js";
 import "js/scroll_util.js";
 import "js/components.js";
+import "js/feedback_widget.js";
 import "js/localstorage.js";
 import "js/drafts.js";
 import "js/input_pill.js";
diff --git a/static/js/feedback_widget.js b/static/js/feedback_widget.js
new file mode 100644
index 0000000000..f46a409866
--- /dev/null
+++ b/static/js/feedback_widget.js
@@ -0,0 +1,140 @@
+var feedback_widget = (function () {
+
+var exports = {};
+
+/*
+
+This code lets you show something like this:
+
+    +-----
+    | TOPIC MUTES [undo] [x]
+    |
+    | You muted stream Foo, topic Bar.
+    +-----
+
+And then you configure the undo behavior, and
+everything else is controlled by the widget.
+
+Codewise it's a singleton widget that controls the DOM inside
+#feedback_container, which gets served up by server.
+
+*/
+
+
+var meta = {
+    hide_me_time: null,
+    alert_hover_state: false,
+    $container: null,
+    opened: false,
+};
+
+var animate = {
+    maybe_close: function () {
+        if (!meta.opened) {
+            return;
+        }
+
+        if (meta.hide_me_time < new Date().getTime() && !meta.alert_hover_state) {
+            animate.fadeOut();
+            return;
+        }
+
+        setTimeout(animate.maybe_close, 100);
+    },
+    fadeOut: function () {
+        if (!meta.opened) {
+            return;
+        }
+
+        if (meta.$container) {
+            meta.$container.fadeOut(500).removeClass("show");
+            meta.opened = false;
+            meta.alert_hover_state = false;
+        }
+    },
+    fadeIn: function () {
+        if (meta.opened) {
+            return;
+        }
+
+        if (meta.$container) {
+            meta.$container.fadeIn(500).addClass("show");
+            meta.opened = true;
+            setTimeout(animate.maybe_close, 100);
+        }
+    },
+};
+
+function set_up_handlers() {
+    if (meta.handlers_set) {
+        return;
+    }
+
+    meta.handlers_set = true;
+
+    // if the user mouses over the notification, don't hide it.
+    meta.$container.mouseenter(function () {
+        if (!meta.opened) {
+            return;
+        }
+
+        meta.alert_hover_state = true;
+    });
+
+    // once the user's mouse leaves the notification, restart the countdown.
+    meta.$container.mouseleave(function () {
+        if (!meta.opened) {
+            return;
+        }
+
+        meta.alert_hover_state = false;
+        // add at least 2000ms but if more than that exists just keep the
+        // current amount.
+        meta.hide_me_time = Math.max(meta.hide_me_time, new Date().getTime() + 2000);
+    });
+
+    meta.$container.find('.exit-me').click(function () {
+        animate.fadeOut();
+    });
+
+    meta.$container.find(".feedback_undo").click(function () {
+        if (meta.undo) {
+            meta.undo();
+        }
+        animate.fadeOut();
+    });
+}
+
+exports.dismiss = function () {
+    animate.fadeOut();
+};
+
+exports.show = function (opts) {
+    if (!opts.populate) {
+        blueslip.error('programmer needs to supply populate callback.');
+        return;
+    }
+
+    meta.$container = $('#feedback_container');
+
+    set_up_handlers();
+
+    meta.undo = opts.on_undo;
+
+    // add a four second delay before closing up.
+    meta.hide_me_time = new Date().getTime() + 4000;
+
+    meta.$container.find('.feedback_title').text(opts.title_text);
+    meta.$container.find('.feedback_undo').text(opts.undo_button_text);
+    opts.populate(meta.$container.find('.feedback_content'));
+
+    animate.fadeIn();
+};
+
+return exports;
+}());
+
+if (typeof module !== 'undefined') {
+    module.exports = feedback_widget;
+}
+window.feedback_widget = feedback_widget;
diff --git a/static/js/muting_ui.js b/static/js/muting_ui.js
index 8d30915928..5edd237820 100644
--- a/static/js/muting_ui.js
+++ b/static/js/muting_ui.js
@@ -23,125 +23,6 @@ exports.rerender = function () {
     }
 };
 
-exports.build_feedback_widget = function () {
-    var self = {};
-
-    var meta = {
-        hide_me_time: null,
-        alert_hover_state: false,
-        $container: null,
-        opened: false,
-    };
-
-    var animate = {
-        maybe_close: function () {
-            if (!meta.opened) {
-                return;
-            }
-
-            if (meta.hide_me_time < new Date().getTime() && !meta.alert_hover_state) {
-                animate.fadeOut();
-                return;
-            }
-
-            setTimeout(animate.maybe_close, 100);
-        },
-        fadeOut: function () {
-            if (!meta.opened) {
-                return;
-            }
-
-            if (meta.$container) {
-                meta.$container.fadeOut(500).removeClass("show");
-                meta.opened = false;
-                meta.alert_hover_state = false;
-            }
-        },
-        fadeIn: function () {
-            if (meta.opened) {
-                return;
-            }
-
-            if (meta.$container) {
-                meta.$container.fadeIn(500).addClass("show");
-                meta.opened = true;
-                setTimeout(animate.maybe_close, 100);
-            }
-        },
-    };
-
-    function set_up_handlers() {
-        if (meta.handlers_set) {
-            return;
-        }
-
-        meta.handlers_set = true;
-
-        // if the user mouses over the notification, don't hide it.
-        meta.$container.mouseenter(function () {
-            if (!meta.opened) {
-                return;
-            }
-
-            meta.alert_hover_state = true;
-        });
-
-        // once the user's mouse leaves the notification, restart the countdown.
-        meta.$container.mouseleave(function () {
-            if (!meta.opened) {
-                return;
-            }
-
-            meta.alert_hover_state = false;
-            // add at least 2000ms but if more than that exists just keep the
-            // current amount.
-            meta.hide_me_time = Math.max(meta.hide_me_time, new Date().getTime() + 2000);
-        });
-
-        meta.$container.find('.exit-me').click(function () {
-            animate.fadeOut();
-        });
-
-        meta.$container.find(".feedback_undo").click(function () {
-            if (meta.undo) {
-                meta.undo();
-            }
-            animate.fadeOut();
-        });
-    }
-
-    self.dismiss = function () {
-        animate.fadeOut();
-    };
-
-    self.show = function (opts) {
-        if (!opts.populate) {
-            blueslip.error('programmer needs to supply populate callback.');
-            return;
-        }
-
-        meta.$container = $('#feedback_container');
-
-        set_up_handlers();
-
-        meta.undo = opts.on_undo;
-
-        // add a four second delay before closing up.
-        meta.hide_me_time = new Date().getTime() + 4000;
-
-        meta.$container.find('.feedback_title').text(opts.title_text);
-        meta.$container.find('.feedback_undo').text(opts.undo_button_text);
-        opts.populate(meta.$container.find('.feedback_content'));
-
-        animate.fadeIn();
-
-    };
-
-    return self;
-};
-
-exports.notify_widget = exports.build_feedback_widget();
-
 exports.persist_mute = function (stream_id, topic_name) {
     var data = {
         stream_id: stream_id,
@@ -220,7 +101,7 @@ exports.mute = function (stream_id, topic) {
     unread_ui.update_unread_counts();
     exports.rerender();
     exports.persist_mute(stream_id, topic);
-    exports.notify_widget.show({
+    feedback_widget.show({
         populate: function (container) {
             var rendered_html = templates.render('topic_muted');
             container.html(rendered_html);
@@ -246,7 +127,7 @@ exports.unmute = function (stream_id, topic) {
     exports.rerender();
     exports.persist_unmute(stream_id, topic);
     exports.set_up_muted_topics_ui(muting.get_muted_topics());
-    exports.notify_widget.dismiss();
+    feedback_widget.dismiss();
 };
 
 exports.toggle_mute = function (message) {