reselect VS i18next

- Throws better errors in an RSC environment

- https://github.com/reduxjs/react-redux/releases/tag/v9.0.0

## Reselect 5.0:

- Switches to a new `weakMapMemoize` memoizer as default

- Renames `defaultMemoize` to `lruMemoize`

- Allows passing memoizer options direct to `createSelector`

- Many TS improvements

- https://github.com/reduxjs/reselect/releases/tag/v5.0.1

## Redux Thunk 3.0:

- Drops the default export and switches to named exports ( `{thunk, withExtraArgument}` )

- https://github.com/reduxjs/redux-thunk/releases/tag/v3.1.0

This has been a _huge_ year-long development effort!

We're thrilled to get these improvements out. The tooling and bundle improvements will help all users, and we think the features and TS changes will improve the Redux dev experience significantly.

Thank you SO MUCH to everyone who has contributed or helped test out the work!

Please file bug reports for the inevitable issues that pop up post-release!

but now I'm going off on a conf trip and going to take a very well-earned break from Redux work for December :)

reselect -> For making faster queries to store.

Reselect solves this problem by memorizing the values and only passing what’s necessary.

In addition, diagnosing bugs in how data flowed through the application (where data originated from, how it was changed, etc.) was always super painful because I had to backtrack through selectors referencing selectors referencing selectors. And updating high-level selectors risked breaking something else down the line (even with 100% business logic coverage this was a problem). (This may be chalked up to improper usage of reselect, but I'm curious to hear your thoughts. Is this a common problem?)

reselect : Selector library to optimize your store access

Reselect documentation:

Applying memoization to TypeScript and ReactJS is relatively straightforward. There are several libraries available that provide memoization functionality, such as memoize function from Lodash, reselect or hooks from ReactJS. These libraries can be installed using NPM or Yarn and used in your TypeScript and ReactJS projects.

Generally, all you would need is to have your redux store provider at the very top level of your application (You could also only wrap the components that you want to have this data available to). Then, any component rendered inside that provider can get access to the redux store. The suggested approach ever since hooks were released is to use `useSelector` and `useDispatch` within your component to get the state data that you need. Using a selector library like Reselect is prevalent and keeps your data selection tidy & handles memoization for you.

Reselect is a library for creating memoized “selector” functions. Commonly used with Redux, to slice state and provide just the necessary subtree to a React component.

For this article, we'll leverage the 'Simple CRM' project from our previous list of projects. We'll integrate and utilize the i18n library to internationalize our application.

When starting a new project with Next.js these days, next-intl and zod are my go to libraries for internationalization and schema validation, respectively. Of course, when using zod for client-facing validations I would like to translate potential error messages. The package zod-i18n can be used to achieve this for i18next, a popular alternative internationalization library. This means that by using this library as starting point one can quickly achieve zod translation with next-intl.

The best way to implement internationalization is to use an internationalization framework library, such as i18next. With this kind of library, you can easily handle translations and automatically display your frontend labels in the user's language. The frontend application also needs to be flexible and easily configurable so that its layout can change accordingly, reading from left to right or right to left. CSS allows this with the rtl and ltr CSS direction property.

For reference, I am using i18next for providing translations, which is configured to use the english message string as a key for the translations and fallback to it if no translation is found in the chosen language. I also use the official svelte-i18next integration. It wraps the i18next object in a Svelte store and, among other things, provides reactivity when the language is changed.

// app/components/BuiltInFormatsDemo.tsx 'use client'; import React from 'react'; import {useTranslation} from '../i18n/client'; import type {LocaleTypes} from '../i18n/settings'; import {useParams} from 'next/navigation'; const BuiltInFormatsDemo = () => { let locale = useParams()?.locale as LocaleTypes; const {t} = useTranslation(locale, 'built-in-demo'); return (

{/* "number": "Number: {{val, number}}", */} {t('number', { val: 123456789.0123, })} p>

{/* "currency": "Currency: {{val, currency}}", */} {t('currency', { val: 123456789.0123, style: 'currency', currency: 'USD', })} p>

{/* "dateTime": "Date/Time: {{val, datetime}}", */} {t('dateTime', { val: new Date(1234567890123), formatParams: { val: { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric', }, }, })} p>

{/* "relativeTime": "Relative Time: {{val, relativetime}}", */} {t('relativeTime', { val: 12, style: 'long', })} p>

{/* "list": "List: {{val, list}}", */} {t('list', { // https://www.i18next.com/translation-function/objects-and-arrays#objects // Check the link for more details on `returnObjects` val: t('weekdays', {returnObjects: true}), })} p> div> ); }; export default BuiltInFormatsDemo;

As our world becomes increasingly interconnected, the development of web applications that cater to a global audience takes precedence among developers. If you're a TypeScript developer, you're likely acquainted with the advantages of static typing and the assurance it provides in your codebase. When it comes to internationalization (i18n) and localization (l10n), maintaining the same level of type safety becomes crucial. This is precisely where i18next, an influential i18n framework, enters the picture.

check i18next

In this article, we will go over how to perform internationalisation in our react app using the i18next framework. I18next is an internationalisation framework written in JavaScript. It comes with everything you need to localise your web, desktop or mobile product such as user language detection, loading and caching translations, and file conversion etc More features can be found in their documentation. (https://www.i18next.com/)

Luckily this is a well-solved problem: https://www.i18next.com/

I am so sorry for all the people using https://www.i18next.com/ and manually defining string ids. Fuck that. I will never write another message id in my life.