"use strict" for all frontend files (backend was done earlier)

public/javascripts/context_menu.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const contextMenu = (function() {
     const treeEl = $("#tree");
 

public/javascripts/dialogs/add_link.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const addLink = (function() {
     const dialogEl = $("#insert-link-dialog");
     const formEl = $("#insert-link-form");

public/javascripts/dialogs/event_log.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const eventLog = (function() {
     const dialogEl = $("#event-log-dialog");
     const listEl = $("#event-log-list");

public/javascripts/dialogs/jump_to_note.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const jumpToNote = (function() {
     const dialogEl = $("#jump-to-note-dialog");
     const autoCompleteEl = $("#jump-to-note-autocomplete");

public/javascripts/dialogs/note_history.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const noteHistory = (function() {
     const dialogEl = $("#note-history-dialog");
     const listEl = $("#note-history-list");

public/javascripts/dialogs/recent_changes.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const recentChanges = (function() {
     const dialogEl = $("#recent-changes-dialog");
 

public/javascripts/dialogs/recent_notes.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const recentNotes = (function() {
     const dialogEl = $("#recent-notes-dialog");
     const selectBoxEl = $('#recent-notes-select-box');

public/javascripts/dialogs/settings.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const settings = (function() {
     const dialogEl = $("#settings-dialog");
     const tabsEl = $("#settings-tabs");

public/javascripts/drag_and_drop.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const dragAndDropSetup = {
     autoExpandMS: 600,
     draggable: { // modify default jQuery draggable options

public/javascripts/encryption.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const encryption = (function() {
     const dialogEl = $("#encryption-password-dialog");
     const encryptionPasswordFormEl = $("#encryption-password-form");

public/javascripts/init.js

@@ -1,4 +1,6 @@
-glob = {
+"use strict";
+
+const glob = {
     activeDialog: null
 };
 

public/javascripts/link.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const link = (function() {
     function getNoteIdFromLink(url) {
         const noteIdMatch = /app#([A-Za-z0-9]{12})/.exec(url);

public/javascripts/migration.js

@@ -1,3 +1,5 @@
+"use strict";
+
 $(document).ready(() => {
     $.get(baseApiUrl + 'migration').then(result => {
         const appDbVersion = result.app_db_version;

public/javascripts/note_editor.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const noteEditor = (function() {
     const treeEl = $("#tree");
     const noteTitleEl = $("#note-title");

public/javascripts/note_tree.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const noteTree = (function() {
     const noteDetailEl = $('#note-detail');
     const treeEl = $("#tree");
@@ -37,10 +39,10 @@ const noteTree = (function() {
     }
 
     function setExpandedToServer(note_id, is_expanded) {
-        expanded_num = is_expanded ? 1 : 0;
+        const expandedNum = is_expanded ? 1 : 0;
 
         $.ajax({
-            url: baseApiUrl + 'notes/' + note_id + '/expanded/' + expanded_num,
+            url: baseApiUrl + 'notes/' + note_id + '/expanded/' + expandedNum,
             type: 'PUT',
             contentType: "application/json",
             success: result => {}

public/javascripts/status.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const status = (function() {
     const treeEl = $("#tree");
     const $changesToPushCountEl = $("#changesToPushCount");

public/javascripts/sync.js

@@ -1,3 +1,5 @@
+"use strict";
+
 function syncNow() {
     $.ajax({
         url: baseApiUrl + 'sync/now',

public/javascripts/tree_mutations.js

@@ -1,3 +1,5 @@
+"use strict";
+
 function moveBeforeNode(node, beforeNode) {
     $.ajax({
         url: baseApiUrl + 'notes/' + node.key + '/moveBefore/' + beforeNode.key,

public/javascripts/tree_utils.js

@@ -1,3 +1,5 @@
+"use strict";
+
 const treeEl = $("#tree");
 
 function getParentKey(node) {

public/javascripts/utils.js

@@ -1,3 +1,5 @@
+"use strict";
+
 function message(str) {
     const top = $("#top-message");