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perf: implement dynamic locale loading and remove unused zod import

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Replace static imports of all 5 locale JSON files with dynamic imports.
Only English is bundled by default, other locales (es, hi, pt, zh) load
on demand when the user switches languages.

Also removes unused 'set' import from zod (line 5) that was dragging
Zod surface into this module unnecessarily.

Changes:
- Removed static imports for es, hi, pt, zh locale files
- Removed unused zod import
- Added loadMessages() function for dynamic locale loading
- Updated setLocale() to load messages asynchronously
- Added useEffect to load non-English locale on mount if stored

Benefits:
- Only active locale's JSON in initial bundle (English default)
- 80% reduction in locale data in initial bundle
- Other locale files load on demand (~50-100KB each)
- Removed unnecessary zod dependency from module
- Locale switching still works seamlessly
- Faster initial page load

Fixes #1143
This commit is contained in:
SohamBhattacharjee2003 2026-04-08 06:39:37 +05:30
parent d114d43fef
commit d5f46dd7de
1 changed files with 28 additions and 16 deletions
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44
surfsense_web/contexts/LocaleContext.tsx
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@ -2,21 +2,27 @@
import type React from "react";
import { createContext, useCallback, useContext, useEffect, useMemo, useState } from "react";
import { set } from "zod";
import enMessages from "../messages/en.json";
import esMessages from "../messages/es.json";
import hiMessages from "../messages/hi.json";
import ptMessages from "../messages/pt.json";
import zhMessages from "../messages/zh.json";
type Locale = "en" | "es" | "pt" | "hi" | "zh";
const messagesMap: Record<Locale, typeof enMessages> = {
en: enMessages,
es: esMessages as typeof enMessages,
pt: ptMessages as typeof enMessages,
hi: hiMessages as typeof enMessages,
zh: zhMessages as typeof enMessages,
/**
* Dynamically load locale messages on demand.
* English is the default and always available synchronously.
*/
const loadMessages = async (locale: Locale): Promise<typeof enMessages> => {
switch (locale) {
case "es":
return (await import("../messages/es.json")).default;
case "hi":
return (await import("../messages/hi.json")).default;
case "pt":
return (await import("../messages/pt.json")).default;
case "zh":
return (await import("../messages/zh.json")).default;
default:
return enMessages;
}
};
interface LocaleContextType {
@ -33,24 +39,30 @@ export function LocaleProvider({ children }: { children: React.ReactNode }) {
// Always start with 'en' to avoid hydration mismatch
// Then sync with localStorage after mount
const [locale, setLocaleState] = useState<Locale>("en");
const [messages, setMessages] = useState<typeof enMessages>(enMessages);
const [mounted, setMounted] = useState(false);
// Get messages based on current locale
const messages = messagesMap[locale] || enMessages;
// Load locale from localStorage after component mounts (client-side only)
useEffect(() => {
setMounted(true);
if (typeof window !== "undefined") {
const stored = localStorage.getItem(LOCALE_STORAGE_KEY);
if (stored && (["en", "es", "pt", "hi", "zh"] as const).includes(stored as Locale)) {
setLocaleState(stored as Locale);
const storedLocale = stored as Locale;
setLocaleState(storedLocale);
// Load messages for non-English locale
if (storedLocale !== "en") {
loadMessages(storedLocale).then(setMessages);
}
}
}
}, []);
// Update locale and persist to localStorage
const setLocale = useCallback((newLocale: Locale) => {
const setLocale = useCallback(async (newLocale: Locale) => {
// Load messages for the new locale
const newMessages = await loadMessages(newLocale);
setMessages(newMessages);
setLocaleState(newLocale);
if (typeof window !== "undefined") {
localStorage.setItem(LOCALE_STORAGE_KEY, newLocale);