AdonisJS language switcher

The repo contains code for a demo application that showcase how to implement a language switcher.

The language switcher stores the user preferred language within sessions and displays the translated text for the selected language.

Usage

Following are the steps to get the application running on your computer.

• Clone the repo
• Install dependencies by running npm install or yarn install
• Copy .env.example to .env.
• Start the development server by running node ace serve --watch

Visit the homepage and use the language dropdown on the top right to switch between the languages.

Storing the preferred language

• Everytime the user selects a language, we make a POST request to the /language/:locale endpoint and update the user language to the selected language.
• Yes, it should be a POST request and not GET. The GET requests can have unwanted side-effects if you have prefetching enabled.

Displaying translated content

• On every HTTP request, the DetectUserLocale midddleware reads the user preferred language from the session.
• Check it against the locales supported by the application.
• And uses the switchLocale method to update the locale for the rest of the request.
• From here on ctx.i18n and the t helper inside templates will use the user preferred language.