#Remix-paraglidejs

Translate your Remix apps with ParaglideJS.

This dependency includes utilities that will help you set up your Remix app to use ParaglideJS.

#Installation

Assuming you have a Remix app using Vite and have already set up Paraglide, follow these steps:

1. Install the required packages:

npm i --save remix-paraglidejs @inlang/paraglide-js-adapter-vite

2. Modify vite.config.ts.

import { vitePlugin as remix } from "@remix-run/dev";
import { installGlobals } from "@remix-run/node";
import { defineConfig } from "vite";
import tsconfigPaths from "vite-tsconfig-paths";
/* --- INCLUDE THIS --- */
import { paraglide } from "@inlang/paraglide-js-adapter-vite";
/* ----------------- */

installGlobals();

export default defineConfig({
  plugins: [
    remix(),
    tsconfigPaths(),
    /* --- INCLUDE THIS --- */
    paraglide({
      project: "./project.inlang", //Path to your inlang project 
      outdir: "./paraglide", //Where you want the generated files to be placed
    }),
    /* ----------------- */
  ],
});

3. Include your messages folder with two files like these ones:

messages/en.js

{
  "title": "Remix web example",
  "description": "This is a simple example of how to use Remix to create a web app."
}

messages/es.js

{
  "title": "Remix web de ejemplo",
  "description": "Este es un ejemplo de una web de remix"
}

4. Run npm run dev to generate the paraglide directory.

5. Now we need to modify the Remix entry files entry.client.tsx and entry.server.tsx. If you don't see these files, use npx remix reveal.

// entry.client.tsx
import { RemixBrowser } from "@remix-run/react";
import { startTransition, StrictMode } from "react";
import { hydrateRoot } from "react-dom/client";
/* --- INCLUDE THIS --- */
import { hydrateLang } from 'remix-paraglidejs/client';
import { availableLanguageTags, setLanguageTag } from "<YOUR_PARAGLIDE_DIR>/runtime";
/* ----------------- */

startTransition(() => {
  /* --- INCLUDE THIS --- */
  const lang = hydrateLang('language-tag', availableLanguageTags);
  setLanguageTag(lang);
  /* ----------------- */
  hydrateRoot(
    document,
    <StrictMode>
      <RemixBrowser />
    </StrictMode>
  );
});

// entry.server.tsx
import { PassThrough } from "node:stream";

import type { AppLoadContext, EntryContext } from "@remix-run/node";
import { RemixServer } from "@remix-run/react";
import { isbot } from "isbot";
import { renderToPipeableStream } from "react-dom/server";
import {
  createReadableStreamFromReadable,
/* --- INCLUDE THIS --- */
  createCookie,
} from "@remix-run/node";
import { setLangServerCookie, getContextLang } from 'remix-paraglidejs/server';
import { setLanguageTag, availableLanguageTags } from "<YOUR_PARAGLIDE_DIR>/runtime";

// language-tag value the same as the one in the entry.client.tsx
export const setLangCookie = createCookie("language-tag", {});
/* ----------------- */

const ABORT_DELAY = 5_000;

export default function handleRequest(
  request: Request,
  responseStatusCode: number,
  responseHeaders: Headers,
  remixContext: EntryContext,
) {
  return isbot(request.headers.get("user-agent") || "")
    ? handleBotRequest(
        request,
        responseStatusCode,
        responseHeaders,
        remixContext
      )
    : handleBrowserRequest(
        request,
        responseStatusCode,
        responseHeaders,
        remixContext
      );
}

function handleBotRequest(
  request: Request,
  responseStatusCode: number,
  responseHeaders: Headers,
  remixContext: EntryContext
) {
  return new Promise((resolve, reject) => {
    let shellRendered = false;
    const { pipe, abort } = renderToPipeableStream(
      <RemixServer
        context={remixContext}
        url={request.url}
        abortDelay={ABORT_DELAY}
      />,
      {
        onAllReady() {
          shellRendered = true;
          const body = new PassThrough();
          const stream = createReadableStreamFromReadable(body);

          responseHeaders.set("Content-Type", "text/html");

          resolve(
            new Response(stream, {
              headers: responseHeaders,
              status: responseStatusCode,
            })
          );

          pipe(body);
        },
        onShellError(error: unknown) {
          reject(error);
        },
        onError(error: unknown) {
          responseStatusCode = 500;
          if (shellRendered) {
            console.error(error);
          }
        },
      }
    );

    setTimeout(abort, ABORT_DELAY);
  });
}

function handleBrowserRequest(
  request: Request,
  responseStatusCode: number,
  responseHeaders: Headers,
  remixContext: EntryContext
) {
  return new Promise((resolve, reject) => {
    let shellRendered = false;
    /* --- INCLUDE THIS --- */
    const lang = getContextLang(remixContext, {
      defaultValue: availableLanguageTags[0],
      availableLanguages: availableLanguageTags,
      // The URL parameter to look for when determining the language
      // for example ($lang)._index.tsx
      urlParam: 'lang',
    });
    setLanguageTag(lang);
    /* ----------------- */
    const { pipe, abort } = renderToPipeableStream(
      <RemixServer
        context={remixContext}
        url={request.url}
        abortDelay={ABORT_DELAY}
      />,
      {
        async onShellReady() {
          shellRendered = true;
          const body = new PassThrough();
          const stream = createReadableStreamFromReadable(body);

          responseHeaders.set("Content-Type", "text/html");
          /* --- INCLUDE THIS --- */
          await setLangServerCookie(lang, responseHeaders, setLangCookie);
          /* ----------------- */

          resolve(
            new Response(stream, {
              headers: responseHeaders,
              status: responseStatusCode,
            })
          );

          pipe(body);
        },
        onShellError(error: unknown) {
          reject(error);
        },
        onError(error: unknown) {
          responseStatusCode = 500;
          if (shellRendered) {
            console.error(error);
          }
        },
      }
    );

    setTimeout(abort, ABORT_DELAY);
  });
}

Remix route usage

Once you have these files modified you can include your route for example the _index.tsx as ($lang)._index.tsx, and use Paraglide.

import { Link } from '@remix-run/react';
import * as m from '<YOUR_PARAGLIDE_DIR>/messages';

export default function Index() {
  return (
    <div style={{ fontFamily: "system-ui, sans-serif", lineHeight: "1.8" }}>
      <h1>{m.title()}</h1>
      <p>{m.description()}</p>
      <ul>
        <li>
          <Link
            to="/en"
            reloadDocument
          >
            EN
          </Link>
        </li>
        <li>
          <Link
            to="/es"
            reloadDocument
          >
            ES
          </Link>
        </li>
      </ul>
    </div>
  );
}

Check out our examples to review how to use links without reloadDocument or a page without the ($lang).

Recommendation: Install Sherlock extension.