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i18next-electron-fs-backend

This is an i18next library designed to work with secure-electron-template. The library is a rough copy of i18next-node-fs-backend but using IPC (inter-process-communication) to request a file be read or written from the electron's main process. The translation files that are written are written synchronously, but this should not be a problem because you should be creating translation files in development only (translation files should already exist before deploying to production environments).

How to install

Install the package

npm i i18next-electron-fs-backend

Add into your i18next config

Based on documentation for a i18next config, import the backend.

import i18n from "i18next";
import {
  initReactI18next
} from "react-i18next";
import backend from "i18next-electron-fs-backend";

i18n
  .use(backend)
  .use(initReactI18next)
  .init({
    backend: {
      loadPath: "./app/localization/locales/{{lng}}/{{ns}}.json",
      addPath: "./app/localization/locales/{{lng}}/{{ns}}.missing.json",
      contextBridgeApiKey: "api" // needs to match first parameter of contextBridge.exposeInMainWorld in preload file; defaults to "api"
    },

    // other options you might configure
    debug: true,
    saveMissing: true,
    saveMissingTo: "current",
    lng: "en"
  });

export default i18n;

Update your preload.js script

const {
    contextBridge,
    ipcRenderer
} = require("electron");
const backend = require("i18next-electron-fs-backend");

contextBridge.exposeInMainWorld(
    "api", {
        i18nextElectronBackend: backend.preloadBindings(ipcRenderer, process)
    }
);

Update your main.js script

const {
  app,
  BrowserWindow,
  session,
  ipcMain
} = require("electron");
const backend = require("i18next-electron-fs-backend");
const fs = require("fs");

let win;

async function createWindow() {  
  win = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      contextIsolation: true,
      preload: path.join(__dirname, "preload.js")
    }
  });

  backend.mainBindings(ipcMain, win, fs); // <- configures the backend
  
  // ...
}

app.on("ready", createWindow);

app.on("window-all-closed", () => {
  // On macOS it is common for applications and their menu bar
  // to stay active until the user quits explicitly with Cmd + Q
  if (process.platform !== "darwin") {
    app.quit();
  } else {
    i18nextBackend.clearMainBindings(ipcMain);
  }
});

Options

These are options that are configurable, all values below are defaults.

{
    debug: false, // If you'd like to show diagnostic messages
    loadPath: "/locales/{{lng}}/{{ns}}.json", // Where the translation files get loaded from
    addPath: "/locales/{{lng}}/{{ns}}.missing.json" // Where the missing translation files get generated    
}