Implement shared local storage
share theme, language
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Query language and style options from parent window -
Sharing localStorage (parent window vs iFrame): -
https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage -
https://levelup.gitconnected.com/share-localstorage-sessionstorage-between-different-domains-eb07581e9384 -
But: https://stackoverflow.com/questions/63922558/safari-localstorage-not-shared-between-iframes-hosted-on-same-domain
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