Fix: fix #1813. For some reason, importing a .js-file suddenly fails, so ported it to typescript

src/UI/RemoveOtherLanguages.js

@@ -1,31 +0,0 @@
-let lang = (
-  (navigator.languages && navigator.languages[0]) ||
-  navigator.language ||
-  navigator["userLanguage"] ||
-  "en"
-).substr(0, 2)
-
-function filterLangs(maindiv) {
-  let foundLangs = 0
-  for (const child of Array.from(maindiv.children)) {
-    if (child.attributes.getNamedItem("lang")?.value === lang) {
-      foundLangs++
-    }
-  }
-  if (foundLangs === 0) {
-    lang = "en"
-  }
-  for (const child of Array.from(maindiv.children)) {
-    const childLang = child.attributes.getNamedItem("lang")
-    if (childLang === undefined) {
-      continue
-    }
-    if (childLang.value === lang) {
-      continue
-    }
-    child.parentElement.removeChild(child)
-  }
-}
-
-filterLangs(document.getElementById("descriptions-while-loading"))
-filterLangs(document.getElementById("default-title"))

src/UI/RemoveOtherLanguages.ts

@@ -0,0 +1,32 @@
+export {}
+let lang = (
+    (navigator.languages && navigator.languages[0]) ||
+    navigator.language ||
+    navigator["userLanguage"] ||
+    "en"
+).substr(0, 2)
+
+function filterLangs(maindiv) {
+    let foundLangs = 0
+    for (const child of Array.from(maindiv.children)) {
+        if (child.attributes.getNamedItem("lang")?.value === lang) {
+            foundLangs++
+        }
+    }
+    if (foundLangs === 0) {
+        lang = "en"
+    }
+    for (const child of Array.from(maindiv.children)) {
+        const childLang = child.attributes.getNamedItem("lang")
+        if (childLang === undefined) {
+            continue
+        }
+        if (childLang.value === lang) {
+            continue
+        }
+        child.parentElement.removeChild(child)
+    }
+}
+
+filterLangs(document.getElementById("descriptions-while-loading"))
+filterLangs(document.getElementById("default-title"))