diff --git a/.eslintrc.json b/.eslintrc.json
index 79e21a8b26..1adc90698f 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -361,7 +361,7 @@
             }
         ],
         "space-in-parens": 2,
-        "space-infix-ops": 0,
+        "space-infix-ops": 2,
         "spaced-comment": 0,
         "strict": 0,
         "template-curly-spacing": "error",
diff --git a/frontend_tests/casper_lib/common.js b/frontend_tests/casper_lib/common.js
index f95e837a9f..70d14b31b2 100644
--- a/frontend_tests/casper_lib/common.js
+++ b/frontend_tests/casper_lib/common.js
@@ -166,7 +166,7 @@ exports.select_item_via_typeahead = function (field_selector, str, item) {
 
             var tah = $(field_selector).data().typeahead;
             tah.mouseenter({
-                currentTarget: $('.typeahead:visible li:contains("'+item+'")')[0],
+                currentTarget: $('.typeahead:visible li:contains("' + item + '")')[0],
             });
             tah.select();
         }, {field_selector:field_selector, str: str, item: item});
@@ -271,7 +271,7 @@ exports.then_send_message = function (type, params) {
 // 'table' here).
 exports.get_rendered_messages = function (table) {
     return casper.evaluate(function (table) {
-        var tbl = $('#'+table);
+        var tbl = $('#' + table);
         return {
             headings: $.map(tbl.find('.recipient_row .message-header-contents'), function (elem) {
                 var $clone = $(elem).clone(true);
@@ -349,7 +349,7 @@ exports.trim = function (str) {
 // Call get_rendered_messages and then check that the last few headings and
 // bodies match the specified arrays.
 exports.expected_messages = function (table, headings, bodies) {
-    casper.test.assertVisible('#'+table, table + ' is visible');
+    casper.test.assertVisible('#' + table, table + ' is visible');
 
     var msg = exports.get_rendered_messages(table);
 
diff --git a/frontend_tests/casper_tests/03-narrow.js b/frontend_tests/casper_tests/03-narrow.js
index 465f0bf1fb..224d6da305 100644
--- a/frontend_tests/casper_tests/03-narrow.js
+++ b/frontend_tests/casper_tests/03-narrow.js
@@ -179,7 +179,7 @@ function search_silent_user(str, item) {
     casper.then(function () {
         casper.waitUntilVisible('#silent_user', function () {
             casper.test.info("Empty feed for silent user visible.");
-            var expected_message = "\n        You haven't received any messages sent by this user yet!"+
+            var expected_message = "\n        You haven't received any messages sent by this user yet!" +
                                     "\n    ";
             this.test.assertEquals(casper.fetchText('#silent_user'), expected_message);
         });
@@ -192,7 +192,7 @@ function search_non_existing_user(str, item) {
     casper.then(function () {
         casper.waitUntilVisible('#non_existing_user', function () {
             casper.test.info("Empty feed for non existing user visible.");
-            var expected_message = "\n        This user does not exist!"+
+            var expected_message = "\n        This user does not exist!" +
                                     "\n    ";
             this.test.assertEquals(casper.fetchText('#non_existing_user'), expected_message);
         });
diff --git a/frontend_tests/casper_tests/10-admin.js b/frontend_tests/casper_tests/10-admin.js
index 386338ee96..dd8b203d3f 100644
--- a/frontend_tests/casper_tests/10-admin.js
+++ b/frontend_tests/casper_tests/10-admin.js
@@ -299,7 +299,7 @@ function select_from_suggestions(item) {
         casper.evaluate(function (item) {
             var tah = $('.create_default_stream').data().typeahead;
             tah.mouseenter({
-                currentTarget: $('.typeahead:visible li:contains("'+item+'")')[0],
+                currentTarget: $('.typeahead:visible li:contains("' + item + '")')[0],
             });
             tah.select();
         }, {item: item});
@@ -320,21 +320,21 @@ casper.then(function () {
 });
 
 casper.then(function () {
-    casper.waitUntilVisible('.default_stream_row[id='+stream_name+']', function () {
-        casper.test.assertSelectorHasText('.default_stream_row[id='+stream_name+'] .default_stream_name', stream_name);
+    casper.waitUntilVisible('.default_stream_row[id=' + stream_name + ']', function () {
+        casper.test.assertSelectorHasText('.default_stream_row[id=' + stream_name + '] .default_stream_name', stream_name);
     });
 });
 
 casper.then(function () {
-    casper.waitUntilVisible('.default_stream_row[id='+stream_name+']', function () {
-        casper.test.assertSelectorHasText('.default_stream_row[id='+stream_name+'] .default_stream_name', stream_name);
-        casper.click('.default_stream_row[id='+stream_name+'] button.remove-default-stream');
+    casper.waitUntilVisible('.default_stream_row[id=' + stream_name + ']', function () {
+        casper.test.assertSelectorHasText('.default_stream_row[id=' + stream_name + '] .default_stream_name', stream_name);
+        casper.click('.default_stream_row[id=' + stream_name + '] button.remove-default-stream');
     });
 });
 
 casper.then(function () {
-    casper.waitWhileVisible('.default_stream_row[id='+stream_name+']', function () {
-        casper.test.assertDoesntExist('.default_stream_row[id='+stream_name+']');
+    casper.waitWhileVisible('.default_stream_row[id=' + stream_name + ']', function () {
+        casper.test.assertDoesntExist('.default_stream_row[id=' + stream_name + ']');
     });
 });
 
diff --git a/frontend_tests/node_tests/activity.js b/frontend_tests/node_tests/activity.js
index d968fec2e9..0793cc6021 100644
--- a/frontend_tests/node_tests/activity.js
+++ b/frontend_tests/node_tests/activity.js
@@ -387,8 +387,8 @@ function simulate_list_items(items) {
     $('#user_presences').set_find_results('li.user_sidebar_entry', list);
 
     _.each(items, (item, i) => {
-        item.next = () => items[i+1] || {length: 0};
-        item.prev = () => items[i-1] || {length: 0};
+        item.next = () => items[i + 1] || {length: 0};
+        item.prev = () => items[i - 1] || {length: 0};
     });
 }
 
diff --git a/frontend_tests/node_tests/compose.js b/frontend_tests/node_tests/compose.js
index ff6c5c35c8..895d2c5762 100644
--- a/frontend_tests/node_tests/compose.js
+++ b/frontend_tests/node_tests/compose.js
@@ -349,8 +349,8 @@ run_test('markdown_shortcuts', () => {
     global.document.execCommand = function (cmd, bool, markdown) {
         var compose_textarea = $("#compose-textarea");
         var value = compose_textarea.val();
-        $("#compose-textarea").val(value.substring(0, compose_textarea.range().start)+
-            markdown+value.substring(compose_textarea.range().end, value.length));
+        $("#compose-textarea").val(value.substring(0, compose_textarea.range().start) +
+            markdown + value.substring(compose_textarea.range().end, value.length));
     };
 
     $("#compose-textarea").range = function () {
@@ -359,7 +359,7 @@ run_test('markdown_shortcuts', () => {
             end: range_start + range_length,
             length: range_length,
             range: noop,
-            text: $("#compose-textarea").val().substring(range_start, range_length+range_start),
+            text: $("#compose-textarea").val().substring(range_start, range_length + range_start),
         };
     };
     $('#compose-textarea').caret = noop;
diff --git a/frontend_tests/node_tests/compose_pm_pill.js b/frontend_tests/node_tests/compose_pm_pill.js
index 47f6b97cb7..4a8d08ffc1 100644
--- a/frontend_tests/node_tests/compose_pm_pill.js
+++ b/frontend_tests/node_tests/compose_pm_pill.js
@@ -58,7 +58,7 @@ run_test('pills', () => {
         pills = {
             pill: {},
         };
-        all_pills= {};
+        all_pills = {};
     };
 
     var appendValue_called;
diff --git a/frontend_tests/node_tests/composebox_typeahead.js b/frontend_tests/node_tests/composebox_typeahead.js
index 864acfea6e..4b9576ab8b 100644
--- a/frontend_tests/node_tests/composebox_typeahead.js
+++ b/frontend_tests/node_tests/composebox_typeahead.js
@@ -936,7 +936,7 @@ run_test('begins_typeahead', () => {
 
     var all_items = _.map(['all', 'everyone', 'stream'], function (mention) {
         return {
-            special_item_text: 'translated: ' + mention +" (Notify stream)",
+            special_item_text: 'translated: ' + mention + " (Notify stream)",
             email: mention,
             pm_recipient_count: Infinity,
             full_name: mention,
@@ -1130,7 +1130,7 @@ run_test('content_highlighter', () => {
 run_test('typeahead_results', () => {
     var all_items = _.map(['all', 'everyone', 'stream'], function (mention) {
         return {
-            special_item_text: 'translated: ' + mention +" (Notify stream)",
+            special_item_text: 'translated: ' + mention + " (Notify stream)",
             email: mention,
             pm_recipient_count: Infinity,
             full_name: mention,
diff --git a/frontend_tests/node_tests/message_edit.js b/frontend_tests/node_tests/message_edit.js
index 9d28f8661f..bac8e18a34 100644
--- a/frontend_tests/node_tests/message_edit.js
+++ b/frontend_tests/node_tests/message_edit.js
@@ -54,7 +54,7 @@ run_test('get_editability', () => {
         realm_message_content_edit_limit_seconds: 10,
     };
     var now = new Date();
-    var current_timestamp = now/1000;
+    var current_timestamp = now / 1000;
     message.timestamp = current_timestamp - 60;
     // Have 55+10 > 60 seconds from message.timestamp to edit the message; we're good!
     assert.equal(get_editability(message, 55), editability_types.FULL);
diff --git a/frontend_tests/node_tests/message_list.js b/frontend_tests/node_tests/message_list.js
index d1e871a254..a8cb803d34 100644
--- a/frontend_tests/node_tests/message_list.js
+++ b/frontend_tests/node_tests/message_list.js
@@ -270,7 +270,7 @@ run_test('last_sent_by_me', () => {
 run_test('local_echo', () => {
     var list = new MessageList({});
     list.append([{id:10}, {id:20}, {id:30}, {id:20.02}, {id:20.03}, {id:40}, {id:50}, {id:60}]);
-    list._local_only= {20.02: {id:20.02}, 20.03: {id:20.03}};
+    list._local_only = {20.02: {id:20.02}, 20.03: {id:20.03}};
 
     assert.equal(list.closest_id(10), 10);
     assert.equal(list.closest_id(20), 20);
@@ -294,8 +294,8 @@ run_test('local_echo', () => {
     list.append([
         {id:10}, {id:20}, {id:30}, {id:20.02}, {id:20.03}, {id:40},
         {id:50}, {id: 50.01}, {id: 50.02}, {id:60}]);
-    list._local_only= {20.02: {id:20.02}, 20.03: {id:20.03},
-                       50.01: {id: 50.01}, 50.02: {id: 50.02}};
+    list._local_only = {20.02: {id:20.02}, 20.03: {id:20.03},
+                        50.01: {id: 50.01}, 50.02: {id: 50.02}};
 
     assert.equal(list.closest_id(10), 10);
     assert.equal(list.closest_id(20), 20);
diff --git a/frontend_tests/node_tests/settings_user_groups.js b/frontend_tests/node_tests/settings_user_groups.js
index f1f4eb82d5..ba6c5eeefc 100644
--- a/frontend_tests/node_tests/settings_user_groups.js
+++ b/frontend_tests/node_tests/settings_user_groups.js
@@ -398,7 +398,7 @@ run_test('with_external_user', () => {
 
     var exit_button = $.create('fake-pill-exit');
     pill_stub.set_find_results('.exit', exit_button);
-    var exit_button_called=false;
+    var exit_button_called = false;
     exit_button.css = function (property, value) {
         exit_button_called = true;
         assert.equal(property, 'opacity');
diff --git a/frontend_tests/node_tests/templates.js b/frontend_tests/node_tests/templates.js
index e95e05c2b0..68e2cd8d2a 100644
--- a/frontend_tests/node_tests/templates.js
+++ b/frontend_tests/node_tests/templates.js
@@ -1564,7 +1564,7 @@ run_test('embedded_bot_config_item', () => {
     };
     var html = render('embedded_bot_config_item', args);
     assert.equal($(html).attr('name'), args.botname);
-    assert.equal($(html).attr('id'), args.botname+'_'+args.key);
+    assert.equal($(html).attr('id'), args.botname + '_' + args.key);
     assert.equal($(html).find('label').text(), args.key);
     assert.equal($(html).find('input').attr('placeholder'), args.value);
 });
diff --git a/frontend_tests/node_tests/typeahead_helper.js b/frontend_tests/node_tests/typeahead_helper.js
index d77acd58f7..d1dbcccf2b 100644
--- a/frontend_tests/node_tests/typeahead_helper.js
+++ b/frontend_tests/node_tests/typeahead_helper.js
@@ -324,7 +324,7 @@ run_test('sort_recipients', () => {
     assert.deepEqual(recipients_email, expected);
 
     // Reset matches
-    matches.splice(matches.length-1, 1);
+    matches.splice(matches.length - 1, 1);
 
     // full_name starts with same character but emails are 'all'
     var small_matches = [
diff --git a/frontend_tests/node_tests/unread.js b/frontend_tests/node_tests/unread.js
index b2f90b4ca1..8cbf8b08f7 100644
--- a/frontend_tests/node_tests/unread.js
+++ b/frontend_tests/node_tests/unread.js
@@ -286,7 +286,7 @@ run_test('num_unread_for_topic', () => {
     assert.deepEqual(missing_topics, []);
 
     for (i = 0; i < num_msgs; i += 1) {
-        message.id = i+1;
+        message.id = i + 1;
         unread.mark_as_read(message.id);
     }
 
diff --git a/frontend_tests/node_tests/upload.js b/frontend_tests/node_tests/upload.js
index 62da4b7940..1f7f4f8341 100644
--- a/frontend_tests/node_tests/upload.js
+++ b/frontend_tests/node_tests/upload.js
@@ -77,7 +77,7 @@ run_test('upload_error', () => {
         assert.equal($("#compose-error-msg").text(), msg);
     }
 
-    function test(err, msg, server_response=null, file={}) {
+    function test(err, msg, server_response = null, file = {}) {
         setup_test();
         file.lastModified = 1549958107000;
         upload_opts.error(err, server_response, file);
diff --git a/frontend_tests/node_tests/util.js b/frontend_tests/node_tests/util.js
index 7ca03807ad..abc118de47 100644
--- a/frontend_tests/node_tests/util.js
+++ b/frontend_tests/node_tests/util.js
@@ -200,27 +200,27 @@ run_test('all_and_everyone_mentions_regexp', () => {
     ];
 
     var i;
-    for (i=0; i<messages_with_all_mentions.length; i += 1) {
+    for (i = 0; i < messages_with_all_mentions.length; i += 1) {
         assert(util.is_all_or_everyone_mentioned(messages_with_all_mentions[i]));
     }
 
-    for (i=0; i<messages_with_everyone_mentions.length; i += 1) {
+    for (i = 0; i < messages_with_everyone_mentions.length; i += 1) {
         assert(util.is_all_or_everyone_mentioned(messages_with_everyone_mentions[i]));
     }
 
-    for (i=0; i<messages_with_stream_mentions.length; i += 1) {
+    for (i = 0; i < messages_with_stream_mentions.length; i += 1) {
         assert(util.is_all_or_everyone_mentioned(messages_with_stream_mentions[i]));
     }
 
-    for (i=0; i<messages_without_all_mentions.length; i += 1) {
+    for (i = 0; i < messages_without_all_mentions.length; i += 1) {
         assert(!util.is_all_or_everyone_mentioned(messages_without_everyone_mentions[i]));
     }
 
-    for (i=0; i<messages_without_everyone_mentions.length; i += 1) {
+    for (i = 0; i < messages_without_everyone_mentions.length; i += 1) {
         assert(!util.is_all_or_everyone_mentioned(messages_without_everyone_mentions[i]));
     }
 
-    for (i=0; i<messages_without_stream_mentions.length; i += 1) {
+    for (i = 0; i < messages_without_stream_mentions.length; i += 1) {
         assert(!util.is_all_or_everyone_mentioned(messages_without_stream_mentions[i]));
     }
 });
diff --git a/frontend_tests/zjsunit/index.js b/frontend_tests/zjsunit/index.js
index 73a85870af..a109174cac 100644
--- a/frontend_tests/zjsunit/index.js
+++ b/frontend_tests/zjsunit/index.js
@@ -88,7 +88,7 @@ function short_tb(tb) {
         return tb;
     }
 
-    return lines.splice(0, i+1).join('\n') + '\n(...)\n';
+    return lines.splice(0, i + 1).join('\n') + '\n(...)\n';
 }
 
 // Set up bugdown comparison helper
diff --git a/frontend_tests/zjsunit/mdiff.js b/frontend_tests/zjsunit/mdiff.js
index 3e7f80cbe3..75cae31382 100644
--- a/frontend_tests/zjsunit/mdiff.js
+++ b/frontend_tests/zjsunit/mdiff.js
@@ -109,7 +109,7 @@ function diff_strings(string_0, string_1) {
         } else if (line.startsWith("?")) {
             changes_list = parse_questionmark_line(line);
             output_lines[output_lines.length - 1] = apply_color(
-                output_lines[output_lines.length -1], changes_list);
+                output_lines[output_lines.length - 1], changes_list);
         } else {
             output_lines.push(line);
         }
diff --git a/static/js/colorspace.js b/static/js/colorspace.js
index 83183c7e7d..fa212ad591 100644
--- a/static/js/colorspace.js
+++ b/static/js/colorspace.js
@@ -17,7 +17,7 @@ exports.sRGB_to_linear = function (v) {
 // Compute luminance (CIE Y stimulus) from linear intensity
 // of sRGB / Rec. 709 primaries.
 exports.rgb_luminance = function (channel) {
-    return 0.2126*channel[0] + 0.7152*channel[1] + 0.0722*channel[2];
+    return 0.2126 * channel[0] + 0.7152 * channel[1] + 0.0722 * channel[2];
 };
 
 // Convert luminance (photometric, CIE Y)
@@ -27,12 +27,12 @@ exports.rgb_luminance = function (channel) {
 exports.luminance_to_lightness = function (luminance) {
     var v;
     if (luminance <= (216 / 24389)) {
-        v = (841 / 108)*luminance + (4 / 29);
+        v = (841 / 108) * luminance + (4 / 29);
     } else {
-        v = Math.pow(luminance, 1/3);
+        v = Math.pow(luminance, 1 / 3);
     }
 
-    return 116*v - 16;
+    return 116 * v - 16;
 };
 
 exports.getDecimalColor = function (hexcolor) {
diff --git a/static/js/compose_actions.js b/static/js/compose_actions.js
index 55b63b4b26..b500938bef 100644
--- a/static/js/compose_actions.js
+++ b/static/js/compose_actions.js
@@ -160,7 +160,7 @@ exports.maybe_scroll_up_selected_message = function () {
     var cover = selected_row.offset().top + selected_row.height()
         - $("#compose").offset().top;
     if (cover > 0) {
-        message_viewport.user_initiated_animate_scroll(cover+5);
+        message_viewport.user_initiated_animate_scroll(cover + 5);
     }
 };
 
@@ -391,9 +391,9 @@ exports.quote_and_reply = function (opts) {
         idempotent: true,
         success: function (data) {
             if (textarea.val() === "") {
-                textarea.val("```quote\n" + data.raw_content +"\n```\n");
+                textarea.val("```quote\n" + data.raw_content + "\n```\n");
             } else {
-                textarea.val(textarea.val() + "\n```quote\n" + data.raw_content +"\n```\n");
+                textarea.val(textarea.val() + "\n```quote\n" + data.raw_content + "\n```\n");
             }
             $("#compose-textarea").trigger("autosize.resize");
         },
diff --git a/static/js/compose_state.js b/static/js/compose_state.js
index 7db2c4fbc6..b44e234915 100644
--- a/static/js/compose_state.js
+++ b/static/js/compose_state.js
@@ -30,7 +30,7 @@ function get_or_set(fieldname, keep_leading_whitespace) {
     // because the DOM element might not exist yet when get_or_set
     // is called.
     return function (newval) {
-        var elem = $('#'+fieldname);
+        var elem = $('#' + fieldname);
         var oldval = elem.val();
         if (newval !== undefined) {
             elem.val(newval);
diff --git a/static/js/composebox_typeahead.js b/static/js/composebox_typeahead.js
index f7cc32ff29..76482c7a30 100644
--- a/static/js/composebox_typeahead.js
+++ b/static/js/composebox_typeahead.js
@@ -281,8 +281,8 @@ exports.tokenize_compose_str = function (s) {
             // Code block must start on a new line
             if (i === 2) {
                 return s.slice(0);
-            } else if (i > 2 && s[i-3] === "\n") {
-                return s.slice(i-2);
+            } else if (i > 2 && s[i - 3] === "\n") {
+                return s.slice(i - 2);
             }
             break;
         case '#':
@@ -290,7 +290,7 @@ exports.tokenize_compose_str = function (s) {
         case ':':
             if (i === 0) {
                 return s.slice(i);
-            } else if (/[\s(){}\[\]]/.test(s[i-1])) {
+            } else if (/[\s(){}\[\]]/.test(s[i - 1])) {
                 return s.slice(i);
             }
         }
@@ -446,7 +446,7 @@ exports.content_typeahead_selected = function (item) {
         if (beginning.lastIndexOf(":") === 0 ||
             beginning.charAt(beginning.lastIndexOf(":") - 1) === " " ||
             beginning.charAt(beginning.lastIndexOf(":") - 1) === "\n") {
-            beginning = (beginning.substring(0, beginning.length - this.token.length - 1)+ ":" + item.emoji_name + ": ");
+            beginning = (beginning.substring(0, beginning.length - this.token.length - 1) + ":" + item.emoji_name + ": ");
         } else {
             beginning = (beginning.substring(0, beginning.length - this.token.length - 1) + " :" + item.emoji_name + ": ");
         }
diff --git a/static/js/drafts.js b/static/js/drafts.js
index 6bf1335730..5b45ab13dd 100644
--- a/static/js/drafts.js
+++ b/static/js/drafts.js
@@ -207,7 +207,7 @@ exports.setup_page = function (callback) {
             data_array.push([id, data[id]]);
         });
         var data_sorted = data_array.sort(function (draft_a,draft_b) {
-            return draft_a[1].updatedAt-draft_b[1].updatedAt;
+            return draft_a[1].updatedAt - draft_b[1].updatedAt;
         });
         _.each(data_sorted, function (data_element) {
             var draft = data_element[1];
@@ -314,7 +314,7 @@ function drafts_initialize_focus(event_name) {
 
     var draft_element;
     if (event_name === "up_arrow") {
-        draft_element = document.querySelectorAll('[data-draft-id="' + draft_id_arrow[draft_id_arrow.length-1] + '"]');
+        draft_element = document.querySelectorAll('[data-draft-id="' + draft_id_arrow[draft_id_arrow.length - 1] + '"]');
     } else if (event_name === "down_arrow") {
         draft_element = document.querySelectorAll('[data-draft-id="' + draft_id_arrow[0] + '"]');
     }
@@ -410,7 +410,7 @@ exports.drafts_handle_events = function (e, event_key) {
         if (document.activeElement.parentElement.hasAttribute("data-draft-id")) {
             exports.restore_draft(focused_draft);
         } else {
-            var first_draft = draft_id_arrow[draft_id_arrow.length-1];
+            var first_draft = draft_id_arrow[draft_id_arrow.length - 1];
             exports.restore_draft(first_draft);
         }
     }
@@ -429,7 +429,7 @@ exports.launch = function () {
         var draft_list = drafts.draft_model.get();
         var draft_id_list = Object.getOwnPropertyNames(draft_list);
         if (draft_id_list.length > 0) {
-            var last_draft = draft_id_list[draft_id_list.length-1];
+            var last_draft = draft_id_list[draft_id_list.length - 1];
             var last_draft_element = document.querySelectorAll('[data-draft-id="' + last_draft + '"]');
             var focus_element = last_draft_element[0].children[0];
             focus_element.focus();
diff --git a/static/js/emoji_picker.js b/static/js/emoji_picker.js
index a530e0a9ee..e1e28720ab 100644
--- a/static/js/emoji_picker.js
+++ b/static/js/emoji_picker.js
@@ -548,7 +548,7 @@ exports.emoji_select_tab = function (elt) {
     var elt_height = elt.height();
     var currently_selected = "";
     section_head_offsets.forEach(function (o) {
-        if (scrolltop + elt_height/2 >= o.position_y) {
+        if (scrolltop + elt_height / 2 >= o.position_y) {
             currently_selected = o.section;
         }
     });
@@ -563,7 +563,7 @@ exports.emoji_select_tab = function (elt) {
     }
     if (currently_selected) {
         $('.emoji-popover-tab-item.active').removeClass('active');
-        $('.emoji-popover-tab-item[data-tab-name="'+currently_selected+'"]').addClass('active');
+        $('.emoji-popover-tab-item[data-tab-name="' + currently_selected + '"]').addClass('active');
     }
 };
 
diff --git a/static/js/filter.js b/static/js/filter.js
index d5d614c8e3..7558552427 100644
--- a/static/js/filter.js
+++ b/static/js/filter.js
@@ -621,10 +621,10 @@ function describe_unescaped(operators) {
     var more_parts = _.map(operators, function (elem) {
         var operand = elem.operand;
         var canonicalized_operator = Filter.canonicalize_operator(elem.operator);
-        if (canonicalized_operator ==='is') {
+        if (canonicalized_operator === 'is') {
             return describe_is_operator(elem);
         }
-        if (canonicalized_operator ==='has') {
+        if (canonicalized_operator === 'has') {
             // search_suggestion.get_suggestions takes care that this message will
             // only be shown if the `has` operator is not at the last.
             var valid_has_operands = ['image', 'images', 'link', 'links', 'attachment', 'attachments'];
diff --git a/static/js/hashchange.js b/static/js/hashchange.js
index 9b1d3649c2..548b99a141 100644
--- a/static/js/hashchange.js
+++ b/static/js/hashchange.js
@@ -72,7 +72,7 @@ exports.save_narrow = function (operators) {
 exports.parse_narrow = function (hash) {
     var i;
     var operators = [];
-    for (i=1; i<hash.length; i+=2) {
+    for (i = 1; i < hash.length; i += 2) {
         // We don't construct URLs with an odd number of components,
         // but the user might write one.
         try {
@@ -82,7 +82,7 @@ exports.parse_narrow = function (hash) {
                 break;
             }
 
-            var operand  = hash_util.decode_operand(operator, hash[i+1] || '');
+            var operand  = hash_util.decode_operand(operator, hash[i + 1] || '');
             var negated = false;
             if (operator[0] === '-') {
                 negated = true;
diff --git a/static/js/integration_bot_widget.js b/static/js/integration_bot_widget.js
index 99274383ab..5834900b5d 100644
--- a/static/js/integration_bot_widget.js
+++ b/static/js/integration_bot_widget.js
@@ -47,7 +47,7 @@ function create_bot(full_name, short_name, bot_avatar_file, stream_name,
     formData.append('csrfmiddlewaretoken', csrf_token);
     formData.append('full_name', full_name);
     formData.append('short_name', short_name);
-    formData.append('file-'+0, bot_avatar_file);
+    formData.append('file-' + 0, bot_avatar_file);
     channel.post({
         url: '/json/bots',
         data: formData,
diff --git a/static/js/message_events.js b/static/js/message_events.js
index 20777e44d0..f80a38bb44 100644
--- a/static/js/message_events.js
+++ b/static/js/message_events.js
@@ -104,7 +104,7 @@ exports.maybe_advance_to_recently_sent_message = function (messages) {
 
         // Iterate backwards to find the last message sent_by_me, stopping at
         // the pointer position.
-        for (i = messages.length-1; i>=0; i -= 1) {
+        for (i = messages.length - 1; i >= 0; i -= 1) {
             var id = messages[i].id;
             if (id <= selected_id) {
                 break;
diff --git a/static/js/message_fetch.js b/static/js/message_fetch.js
index df02fe9a23..5e11b8db69 100644
--- a/static/js/message_fetch.js
+++ b/static/js/message_fetch.js
@@ -3,7 +3,7 @@ var message_fetch = (function () {
 var exports = {};
 
 var consts = {
-    backfill_idle_time: 10*1000,
+    backfill_idle_time: 10 * 1000,
     error_retry_time: 5000,
     backfill_batch_size: 1000,
     narrow_before: 50,
@@ -315,7 +315,7 @@ exports.initialize = function () {
         // If we fall through here, we need to keep fetching more data, and
         // we'll call back to the function we're in.
         var messages = data.messages;
-        var latest_id = messages[messages.length-1].id;
+        var latest_id = messages[messages.length - 1].id;
 
         exports.load_messages({
             anchor: latest_id.toFixed(),
diff --git a/static/js/message_list_data.js b/static/js/message_list_data.js
index f8703e9c1b..e37f7676b0 100644
--- a/static/js/message_list_data.js
+++ b/static/js/message_list_data.js
@@ -89,7 +89,7 @@ MessageListData.prototype = {
             return false;
         }
 
-        var last_msg = this._items[n-1];
+        var last_msg = this._items[n - 1];
 
         return (last_msg.id === this._selected_id);
     },
diff --git a/static/js/message_viewport.js b/static/js/message_viewport.js
index d14f4124da..993e75d647 100644
--- a/static/js/message_viewport.js
+++ b/static/js/message_viewport.js
@@ -312,9 +312,9 @@ exports.recenter_view = function (message, opts) {
     }
 
     if (is_above || opts.force_center) {
-        exports.set_message_position(message_top, message_height, viewport_info, 1/2);
+        exports.set_message_position(message_top, message_height, viewport_info, 1 / 2);
     } else if (is_below) {
-        exports.set_message_position(message_top, message_height, viewport_info, 1/7);
+        exports.set_message_position(message_top, message_height, viewport_info, 1 / 7);
     }
 };
 
@@ -334,8 +334,8 @@ exports.keep_pointer_in_view = function () {
     }
 
     var info = message_viewport.message_viewport_info();
-    var top_threshold = info.visible_top + (1/10 * info.visible_height);
-    var bottom_threshold = info.visible_top + (9/10 * info.visible_height);
+    var top_threshold = info.visible_top + (1 / 10 * info.visible_height);
+    var bottom_threshold = info.visible_top + (9 / 10 * info.visible_height);
 
     function message_is_far_enough_down() {
         if (message_viewport.at_top()) {
diff --git a/static/js/notifications.js b/static/js/notifications.js
index 1249414e5b..42547e3475 100644
--- a/static/js/notifications.js
+++ b/static/js/notifications.js
@@ -144,7 +144,7 @@ exports.redraw_title = function () {
                 n = 'infinite';
             }
 
-            current_favicon = previous_favicon = '/static/images/favicon/favicon-'+n+'.png';
+            current_favicon = previous_favicon = '/static/images/favicon/favicon-' + n + '.png';
         } else {
             current_favicon = previous_favicon = '/static/favicon.ico?v=2';
         }
diff --git a/static/js/popovers.js b/static/js/popovers.js
index fe561400ea..ac62c35938 100644
--- a/static/js/popovers.js
+++ b/static/js/popovers.js
@@ -373,7 +373,7 @@ exports.render_actions_remind_popover = function (element, id) {
             trigger:   "manual",
         });
         elt.popover("show");
-        current_flatpickr_instance = $('.remind.custom[data-message-id="'+message.id+'"]').flatpickr({
+        current_flatpickr_instance = $('.remind.custom[data-message-id="' + message.id + '"]').flatpickr({
             enableTime: true,
             clickOpens: false,
             defaultDate: moment().format(),
diff --git a/static/js/portico/help.js b/static/js/portico/help.js
index f2c0e064b0..b88810784b 100644
--- a/static/js/portico/help.js
+++ b/static/js/portico/help.js
@@ -9,10 +9,10 @@ function registerCodeSection($codeSection) {
         const language = this.dataset.language;
 
         $li.removeClass("active");
-        $li.filter("[data-language="+language+"]").addClass("active");
+        $li.filter("[data-language=" + language + "]").addClass("active");
 
         $blocks.removeClass("active");
-        $blocks.filter("[data-language="+language+"]").addClass("active");
+        $blocks.filter("[data-language=" + language + "]").addClass("active");
     });
 
     $li.eq(0).click();
diff --git a/static/js/reload.js b/static/js/reload.js
index dcb41d316c..b13ec1f39f 100644
--- a/static/js/reload.js
+++ b/static/js/reload.js
@@ -95,7 +95,7 @@ function preserve_state(send_after_reload, save_pointer, save_narrow, save_compo
     //
     // TODO: Remove the now-unnecessary URL-encoding logic above and
     // just pass the actual data structures through local storage.
-    var token = util.random_int(0, 1024*1024*1024*1024);
+    var token = util.random_int(0, 1024 * 1024 * 1024 * 1024);
 
     ls.set("reload:" + token, url);
     window.location.replace("#reload:" + token);
@@ -262,9 +262,9 @@ exports.initiate = function (options) {
     // while composing.  If they finish or cancel the compose, wait
     // until they're idle again
     var idle_control;
-    var unconditional_timeout = 1000*60*30 + util.random_int(0, 1000*60*5);
-    var composing_timeout     = 1000*60*5  + util.random_int(0, 1000*60);
-    var home_timeout          = 1000*60    + util.random_int(0, 1000*60);
+    var unconditional_timeout = 1000 * 60 * 30 + util.random_int(0, 1000 * 60 * 5);
+    var composing_timeout     = 1000 * 60 * 5  + util.random_int(0, 1000 * 60);
+    var home_timeout          = 1000 * 60    + util.random_int(0, 1000 * 60);
     var compose_done_handler;
     var compose_started_handler;
 
diff --git a/static/js/server_events.js b/static/js/server_events.js
index faf43a4703..e7feb4cbf9 100644
--- a/static/js/server_events.js
+++ b/static/js/server_events.js
@@ -216,8 +216,8 @@ function get_events(options) {
                                undefined,
                                ex.stack);
             }
-            var retry_sec = Math.min(90, Math.exp(get_events_failures/2));
-            get_events_timeout = setTimeout(get_events, retry_sec*1000);
+            var retry_sec = Math.min(90, Math.exp(get_events_failures / 2));
+            get_events_timeout = setTimeout(get_events, retry_sec * 1000);
         },
     });
 }
diff --git a/static/js/settings_account.js b/static/js/settings_account.js
index bc2e7bf5be..5c5410b693 100644
--- a/static/js/settings_account.js
+++ b/static/js/settings_account.js
@@ -418,7 +418,7 @@ exports.set_up = function () {
 
         form_data.append('csrfmiddlewaretoken', csrf_token);
         jQuery.each(file_input[0].files, function (i, file) {
-            form_data.append('file-'+i, file);
+            form_data.append('file-' + i, file);
         });
 
         $("#user-avatar-source").hide();
diff --git a/static/js/settings_bots.js b/static/js/settings_bots.js
index 9d55c4d454..5b70fff273 100644
--- a/static/js/settings_bots.js
+++ b/static/js/settings_bots.js
@@ -184,7 +184,7 @@ exports.set_up = function () {
     var selected_embedded_bot = 'converter';
     $('#select_service_name').val(selected_embedded_bot); // TODO: Use 'select a bot'.
     $('#config_inputbox').children().hide();
-    $("[name*='"+selected_embedded_bot+"']").show();
+    $("[name*='" + selected_embedded_bot + "']").show();
 
     $('#download_botserverrc').click(function () {
         var OUTGOING_WEBHOOK_BOT_TYPE_INT = 3;
@@ -243,13 +243,13 @@ exports.set_up = function () {
             } else if (bot_type === EMBEDDED_BOT_TYPE) {
                 formData.append('service_name', service_name);
                 var config_data = {};
-                $("#config_inputbox [name*='"+service_name+"'] input").each(function () {
+                $("#config_inputbox [name*='" + service_name + "'] input").each(function () {
                     config_data[$(this).attr('name')] = $(this).val();
                 });
                 formData.append('config_data', JSON.stringify(config_data));
             }
             jQuery.each($('#bot_avatar_file_input')[0].files, function (i, file) {
-                formData.append('file-'+i, file);
+                formData.append('file-' + i, file);
             });
             loading.make_indicator(spinner, {text: i18n.t('Creating bot')});
             channel.post({
@@ -265,7 +265,7 @@ exports.set_up = function () {
                     $('#create_payload_url').val('');
                     $('#payload_url_inputbox').hide();
                     $('#config_inputbox').hide();
-                    $("[name*='"+service_name+"'] input").each(function () {
+                    $("[name*='" + service_name + "'] input").each(function () {
                         $(this).val('');
                     });
                     $('#create_bot_type').val(GENERIC_BOT_TYPE);
@@ -311,7 +311,7 @@ exports.set_up = function () {
     $("#select_service_name").on("change", function () {
         $('#config_inputbox').children().hide();
         var selected_bot = $('#select_service_name :selected').val();
-        $("[name*='"+selected_bot+"']").show();
+        $("[name*='" + selected_bot + "']").show();
     });
 
     $("#active_bots_list").on("click", "button.delete_bot", function (e) {
@@ -421,7 +421,7 @@ exports.set_up = function () {
                     formData.append('config_data', JSON.stringify(config_data));
                 }
                 jQuery.each(file_input[0].files, function (i, file) {
-                    formData.append('file-'+i, file);
+                    formData.append('file-' + i, file);
                 });
                 loading.make_indicator(spinner, {text: 'Editing bot'});
                 edit_button.hide();
@@ -442,7 +442,7 @@ exports.set_up = function () {
                             // when the user had a previous uploaded avatar.  Only the content
                             // changes, so we version it to get an uncached copy.
                             image_version += 1;
-                            image.find('img').attr('src', data.avatar_url+'&v='+image_version.toString());
+                            image.find('img').attr('src', data.avatar_url + '&v=' + image_version.toString());
                         }
                     },
                     error: function (xhr) {
diff --git a/static/js/settings_invites.js b/static/js/settings_invites.js
index f692a1a1a0..13f65547f4 100644
--- a/static/js/settings_invites.js
+++ b/static/js/settings_invites.js
@@ -57,7 +57,7 @@ exports.set_up = function () {
     channel.get({
         url: '/json/invites',
         idempotent: true,
-        timeout:  10*1000,
+        timeout:  10 * 1000,
         success: exports.on_load_success,
         error: failed_listing_invites,
     });
diff --git a/static/js/settings_org.js b/static/js/settings_org.js
index 2604d603cd..c9162fe652 100644
--- a/static/js/settings_org.js
+++ b/static/js/settings_org.js
@@ -90,7 +90,7 @@ function get_subsection_property_types(subsection) {
 }
 
 exports.get_realm_time_limits_in_minutes = function (property) {
-    var val = (page_params[property]/ 60).toFixed(1);
+    var val = (page_params[property] / 60).toFixed(1);
     if (parseFloat(val, 10) === parseInt(val, 10)) {
         val = parseInt(val, 10);
     }
@@ -200,23 +200,23 @@ var time_limit_dropdown_values = {
     },
     upto_two_min: {
         text: i18n.t("Up to __time_limit__ after posting", {time_limit: i18n.t("2 minutes")}),
-        seconds: 2*60,
+        seconds: 2 * 60,
     },
     upto_ten_min: {
         text: i18n.t("Up to __time_limit__ after posting", {time_limit: i18n.t("10 minutes")}),
-        seconds: 10*60,
+        seconds: 10 * 60,
     },
     upto_one_hour: {
         text: i18n.t("Up to __time_limit__ after posting", {time_limit: i18n.t("1 hour")}),
-        seconds: 60*60,
+        seconds: 60 * 60,
     },
     upto_one_day: {
         text: i18n.t("Up to __time_limit__ after posting", {time_limit: i18n.t("1 day")}),
-        seconds: 24*60*60,
+        seconds: 24 * 60 * 60,
     },
     upto_one_week: {
         text: i18n.t("Up to __time_limit__ after posting", {time_limit: i18n.t("1 week")}),
-        seconds: 7*24*60*60,
+        seconds: 7 * 24 * 60 * 60,
     },
     custom_limit: {
         text: i18n.t("Up to N minutes after posting"),
@@ -443,7 +443,7 @@ exports.sync_realm_settings = function (property) {
     } else if (property === 'invite_required' || property === 'invite_by_admins_only') {
         property = 'user_invite_restriction';
     }
-    var element =  $('#id_realm_'+property);
+    var element =  $('#id_realm_' + property);
     if (element.length) {
         discard_property_element_changes(element);
     }
@@ -515,15 +515,15 @@ exports.set_up = function () {
         _.each(changing_property_types, function (v, k) {
             var field = changing_property_types[k];
             if (field.type === 'bool') {
-                data[k] = JSON.stringify($('#id_realm_'+k).prop('checked'));
+                data[k] = JSON.stringify($('#id_realm_' + k).prop('checked'));
                 return;
             }
             if (field.type === 'text') {
-                data[k] = JSON.stringify($('#id_realm_'+k).val().trim());
+                data[k] = JSON.stringify($('#id_realm_' + k).val().trim());
                 return;
             }
             if (field.type === 'integer') {
-                data[k] = JSON.stringify(parseInt($("#id_realm_"+k).val().trim(), 10));
+                data[k] = JSON.stringify(parseInt($("#id_realm_" + k).val().trim(), 10));
             }
         });
         return data;
@@ -989,7 +989,7 @@ exports.set_up = function () {
 
         form_data.append('csrfmiddlewaretoken', csrf_token);
         jQuery.each(file_input[0].files, function (i, file) {
-            form_data.append('file-'+i, file);
+            form_data.append('file-' + i, file);
         });
 
         var spinner = $("#upload_icon_spinner").expectOne();
diff --git a/static/js/settings_users.js b/static/js/settings_users.js
index f59d6de387..c3408bc216 100644
--- a/static/js/settings_users.js
+++ b/static/js/settings_users.js
@@ -211,7 +211,7 @@ exports.set_up = function () {
     channel.get({
         url:      '/json/users',
         idempotent: true,
-        timeout:  10*1000,
+        timeout:  10 * 1000,
         success: exports.on_load_success,
         error: failed_listing_users,
     });
diff --git a/static/js/socket.js b/static/js/socket.js
index fc184f75d2..14f52709c7 100644
--- a/static/js/socket.js
+++ b/static/js/socket.js
@@ -287,7 +287,7 @@ Socket.prototype = {
             // immediately reconnect when the page is refreshing
             return 30;
         }
-        return Math.min(90, Math.exp(this._connection_failures/2)) * 1000;
+        return Math.min(90, Math.exp(this._connection_failures / 2)) * 1000;
     },
 
     _try_to_reconnect: function Socket__try_to_reconnect(opts) {
diff --git a/static/js/stats/stats.js b/static/js/stats/stats.js
index 7c8504c513..36c92a2ecc 100644
--- a/static/js/stats/stats.js
+++ b/static/js/stats/stats.js
@@ -166,7 +166,7 @@ function populate_messages_sent_over_time(data) {
 
     var start_dates = data.end_times.map(function (timestamp) {
         // data.end_times are the ends of hour long intervals.
-        return new Date(timestamp*1000 - 60*60*1000);
+        return new Date(timestamp * 1000 - 60 * 60 * 1000);
     });
 
     function aggregate_data(aggregation) {
@@ -211,7 +211,7 @@ function populate_messages_sent_over_time(data) {
         return {
             dates: dates, values: values,
             last_value_is_partial: !is_boundary(new Date(
-                start_dates[start_dates.length-1].getTime() + 60*60*1000))};
+                start_dates[start_dates.length - 1].getTime() + 60 * 60 * 1000))};
     }
 
     // Generate traces
@@ -235,7 +235,7 @@ function populate_messages_sent_over_time(data) {
     var weekly_traces = make_traces(info.dates, info.values, 'bar', date_formatter);
 
     var dates = data.end_times.map(function (timestamp) {
-        return new Date(timestamp*1000);
+        return new Date(timestamp * 1000);
     });
     values = {human: partial_sums(data.everyone.human), bot: partial_sums(data.everyone.bot),
               me: partial_sums(data.user.human)};
@@ -314,7 +314,7 @@ function round_to_percentages(values, total) {
         if (x === 0) {
             return '0%';
         }
-        var unrounded = x/total*100;
+        var unrounded = x / total * 100;
 
         var precision = Math.min(
             6, // this is the max precision (two #, 4 decimal points; 99.9999%).
@@ -340,8 +340,8 @@ function compute_summary_chart_data(time_series_data, num_steps, labels_) {
             num_steps = time_series_data[key].length;
         }
         var sum = 0;
-        for (var i=1; i<=num_steps; i+=1) {
-            sum += time_series_data[key][time_series_data[key].length-i];
+        for (var i = 1; i <= num_steps; i += 1) {
+            sum += time_series_data[key][time_series_data[key].length - i];
         }
         data[key] = sum;
     }
@@ -356,10 +356,10 @@ function compute_summary_chart_data(time_series_data, num_steps, labels_) {
         }
     });
     if (!$.isEmptyObject(data)) {
-        labels[labels.length-1] = "Other";
+        labels[labels.length - 1] = "Other";
         for (key in data) {
             if (data.hasOwnProperty(key)) {
-                values[labels.length-1] += data[key];
+                values[labels.length - 1] += data[key];
             }
         }
     }
@@ -387,7 +387,7 @@ function populate_messages_sent_by_client(data) {
     var everyone_month = compute_summary_chart_data(
         data.everyone, 30, data.display_order.slice(0, 12));
     var label_values = [];
-    for (var i=0; i<everyone_month.values.length; i+=1) {
+    for (var i = 0; i < everyone_month.values.length; i += 1) {
         label_values.push({
             label: everyone_month.labels[i],
             value: everyone_month.labels[i] === "Other" ? -1 : everyone_month.values[i],
@@ -403,7 +403,7 @@ function populate_messages_sent_by_client(data) {
         plot_data.labels.reverse();
         plot_data.percentages.reverse();
         var annotations = {values: [], labels: [], text: []};
-        for (var i=0; i<plot_data.values.length; i+=1) {
+        for (var i = 0; i < plot_data.values.length; i += 1) {
             if (plot_data.values[i] > 0) {
                 annotations.values.push(plot_data.values[i]);
                 annotations.labels.push(plot_data.labels[i]);
@@ -515,7 +515,7 @@ function populate_messages_sent_by_client(data) {
         }
         // prevent standard hash navigation (avoid blinking in IE)
         e.preventDefault();
-        var pos = $id.offset().top+$('.page-content')[0].scrollTop-50;
+        var pos = $id.offset().top + $('.page-content')[0].scrollTop - 50;
         $('.page-content').animate({scrollTop: pos + "px"}, 500);
     });
 }
@@ -531,7 +531,7 @@ function populate_messages_sent_by_message_type(data) {
     function make_plot_data(time_series_data, num_steps) {
         var plot_data = compute_summary_chart_data(time_series_data, num_steps, data.display_order);
         var labels = [];
-        for (var i=0; i<plot_data.labels.length; i+=1) {
+        for (var i = 0; i < plot_data.labels.length; i += 1) {
             labels.push(plot_data.labels[i] + ' (' + plot_data.percentages[i] + ')');
         }
         return {
@@ -646,7 +646,7 @@ function populate_number_of_users(data) {
     };
 
     var end_dates = data.end_times.map(function (timestamp) {
-        return new Date(timestamp*1000);
+        return new Date(timestamp * 1000);
     });
 
     var text = end_dates.map(function (date) {
diff --git a/static/js/stream_color.js b/static/js/stream_color.js
index 2baad5d45d..535f6dd5b5 100644
--- a/static/js/stream_color.js
+++ b/static/js/stream_color.js
@@ -179,8 +179,8 @@ exports.get_color_class = _.memoize(function (color) {
 
     // CSS colors are specified in the sRGB color space.
     // Convert to linear intensity values.
-    for (i=0; i<3; i += 1) {
-        channel[i] = colorspace.sRGB_to_linear(mult * parseInt(match[i+1], 16));
+    for (i = 0; i < 3; i += 1) {
+        channel[i] = colorspace.sRGB_to_linear(mult * parseInt(match[i + 1], 16));
     }
 
     // Compute perceived lightness as CIE L*.
diff --git a/static/js/stream_edit.js b/static/js/stream_edit.js
index 8fecf7c3dc..fddfb349e8 100644
--- a/static/js/stream_edit.js
+++ b/static/js/stream_edit.js
@@ -289,7 +289,7 @@ exports.bulk_set_stream_property = function (sub_data) {
     return channel.post({
         url: '/json/users/me/subscriptions/properties',
         data: {subscription_data: JSON.stringify(sub_data)},
-        timeout: 10*1000,
+        timeout: 10 * 1000,
     });
 };
 
diff --git a/static/js/topic_generator.js b/static/js/topic_generator.js
index 8101dd0022..356b0f0692 100644
--- a/static/js/topic_generator.js
+++ b/static/js/topic_generator.js
@@ -108,7 +108,7 @@ exports.wrap_exclude = function (lst, val) {
     }
 
     var inners = [
-        exports.sub_list_generator(lst, i+1, lst.length),
+        exports.sub_list_generator(lst, i + 1, lst.length),
         exports.sub_list_generator(lst, 0, i),
     ];
 
@@ -127,7 +127,7 @@ exports.reverse_wrap_exclude = function (lst, val) {
 
     var inners = [
         exports.reverse_sub_list_generator(lst, 0, i),
-        exports.reverse_sub_list_generator(lst, i+1, lst.length),
+        exports.reverse_sub_list_generator(lst, i + 1, lst.length),
     ];
 
     return exports.chain(inners);