refact: use shorthand method and property syntax

js/format/Csv.js

@@ -1,5 +1,5 @@
 BR.Csv = {
-    format: function (geoJson) {
+    format(geoJson) {
         const separator = '\t';
         const newline = '\n';
         const messages = geoJson.features[0].properties.messages;

js/format/Fit.js

@@ -1,5 +1,5 @@
 BR.Fit = {
-    format: function (geoJson, turnInstructionMode = 0) {
+    format(geoJson, turnInstructionMode = 0) {
         if (!geoJson?.features) return '';
 
         function calcDistance(p1, p2) {

js/format/Gpx.js

@@ -1,6 +1,6 @@
 // derived from BRouter btools.router.OsmTrack.formatAsGpx
 BR.Gpx = {
-    format: function (geoJson, turnInstructionMode = 0, transportMode = 'bike') {
+    format(geoJson, turnInstructionMode = 0, transportMode = 'bike') {
         if (!geoJson?.features) return '';
 
         class GpxTransform {
@@ -55,9 +55,9 @@ BR.Gpx = {
 
         let gpx = togpx(geoJson, {
             creator: (BR.conf.appName || 'BRouter-Web') + ' ' + BR.version,
-            featureTitle: function () {},
-            featureDescription: function () {},
-            featureCoordTimes: function () {},
+            featureTitle() {},
+            featureDescription() {},
+            featureCoordTimes() {},
             transform: gpxTransform,
         });
         const statsComment = BR.Gpx._statsComment(geoJson);
@@ -67,7 +67,7 @@ BR.Gpx = {
     },
 
     // <!-- track-length = 319 filtered ascend = 2 plain-ascend = -1 cost=533 energy=.0kwh time=44s -->
-    _statsComment: function (geoJson) {
+    _statsComment(geoJson) {
         const props = geoJson.features?.[0].properties;
         if (!props) return '';
 

js/format/Kml.js

@@ -1,5 +1,5 @@
 BR.Kml = {
-    format: function (geoJson) {
+    format(geoJson) {
         // don't export properties as <ExtendedData>, probably no need for it
         geoJson.features[0].properties = { name: geoJson.features[0].properties.name };
         return BR.Xml.pretty(tokml(geoJson));

js/format/VoiceHints.js

@@ -235,7 +235,7 @@
             const wpt = {
                 ele: coord[2],
                 name: cmd.message,
-                extensions: extensions,
+                extensions,
             };
 
             if (wpt.ele === undefined || wpt.ele === null) {

js/format/Xml.js

@@ -2,7 +2,7 @@ BR.Xml = {
     // modified version of
     // https://gist.github.com/sente/1083506#gistcomment-2254622
     // MIT License, Copyright (c) 2016 Stuart Powers, ES6 version by Jonathan Gruber
-    pretty: function (xml, indentSize = 1) {
+    pretty(xml, indentSize = 1) {
         const PADDING = ' '.repeat(indentSize);
         const newline = '\n';