bind arrows only once

main.js

@@ -426,7 +426,7 @@
   }
 
   let makeCoordinatesLinks = (function () {
-    var executed = false
+    let executed = false
     return function () {
       if (executed) return
       executed = true
@@ -697,7 +697,7 @@
   }
 
   let prettifyFiles = (function () {
-    var executed = false
+    let executed = false
     return function (insertedFileRows) {
       if (executed) return
       executed = true
@@ -952,7 +952,12 @@
     bindArrowsForGallery('.swiper-button-prev', '.swiper-button-next')
   }
 
-  function bindArrowsForGallery(leftButtonQuery, rightButtonQuery) {
+  const bindArrowsForGallery = (function () {
+    let executed = false
+    return function(leftButtonQuery, rightButtonQuery) {
+      if (executed) return
+      executed = true
+
       document.addEventListener("keydown", function (e) {
         if (!document.querySelector("dialog").open) return
         switch (e.key) {
@@ -969,6 +974,7 @@
         e.preventDefault()
       })
     }
+  })()
 
   async function sendForm() {
     let formData = new FormData(document.querySelector("form"))