Direction and Language

The PWA dir and lang parameters.

Progressive Web Apps (PWAs) can be tailored for different languages and writing directions through the use of the dir and lang parameters in the HTML tag.

By properly setting the dir and lang parameters, you ensure better user experience, accessibility, and potentially improved SEO for your PWA.

Please note that those values should be in accordance with the ones set as <html> tag attributes.

<html dir="ltr" lang="en">

The dir Parameter

The dir parameter specifies the text directionality of the content in your PWA. It can have one of three values:

  • ltr: Left-to-right, which is used for languages that are read from the left to the right (like English).

  • rtl: Right-to-left, for languages read from the right to the left (like Arabic or Hebrew).

  • auto: Automatically determines the direction based on the content.

Example usage in HTML:

The lang Parameter

The lang parameter declares the default language of the text in the page. This is important for accessibility tools and search engines.


        enabled: true
        dir: "ltr"
        lang: "en"