The ScandiPWA is using different bundles per language. This module is here to handle bundle switching to the specified store language.
1. Switches language per store
Exposes $this->getStaticBundleFile() in generated Magento_Theme/templates/root.phtml.
It does so from themes index.production.html - so find PHP source there.
2. Adds helper to get static versioned files
The $this->getStaticFile($url), where $url is relative to Magento_Theme folder
(generated with npm run build) allows to pass generated files to it.
3. Optimizes static-content deploy
If theme is specified, the static-content deploy wont process all files. It decreases the processed file amount form 2k down to 20-30.
This can be achieved using following command:
magento setup:static-content:deploy -t Scandiweb/pwa