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nextjs-translations

v0.1.0

Published

An internationalization library built for the Next.js 13 `app` directory

Downloads

8

Readme

NextJS Translations

An internationalization library built for the Next.js 13 app directory, which aims to be simple to setup and use

Features

  • Simple setup
  • Automatic language detection (for server-side components)
  • Client-side components that don't rely on Node.js libraries
  • Locales can be imported from any source (such as JSON files, databases, external APIs, etc.)

Installation

npm install nextjs-translations

(For client-side components)

npm install nextjs-translations-client

Usage

//src/translations.ts

import { Translations } from 'nextjs-translations'

export const translations = new Translations({
  locales: [
    localeFromJSON('en', {
      'hello': 'Hello!',
      'hello-name': 'Hello, %%name%%!',
    }),
    localeFromJSON('zh', {
      'hello': '你好!',
      'hello-name': '你好,%%name%%!',
    })
  ],
  defaultLocale: 'en', // optional
})

Now, in your components/pages:

//src/app/page.tsx

import { getT } from 'nextjs-translations'
import { translations } from '../translations'

export default function Page() {
  const t = getT(translations)

  return (
    <div>
      <h1>{t('hello')}</h1>
      <h2>{t('hello-name', { name: 'John' })}</h2>
    </div>
  )
}

Client-side Components

Client-side pages and components (that have "use client"), have to use the client-side version of the t() function. Since code used here is frontend-only code, it has to be in a separate package that doesn't depend on native Node.js packages:

npm install nextjs-translations-client

First, the corresponding backend route has to be created:

//src/app/api/[...translations]/route.ts
import { translations } from "@/translations";
import { TranslationRoute } from "nextjs-translations";

export const GET = TranslationRoute(translations)

Then, the client has to be wrapped in a TranslationsProvider:

"use client"

import { TranslationProvider } from "nextjs-translations-client"

export default function ClientLayout({
  children
}: {
  children: React.ReactNode
}) {
  return (
    <TranslationProvider locale="test">
      {children}
    </TranslationProvider>
  )
}

Finally, the t() function can be used:

"use client"

import { t } from "nextjs-translations-client"

export default function Page() {
  return (
    <main className="overflow-auto">
      <ul>
        <li>Language: en_us</li>
        <li>Example: {t('hello')}</li>
        <li>Example (with variable): {t('hello-name', { name: 'World' })}</li>
      </ul>
    </main>
  )
}