WebSQL

https://habr.com/ru/post/84654/

https://web-panda.ru/post/websql-performance

http://html5ru.com/websql-relyacionnaya-baza-dannyx-na-veb-stranice.html

https://qastack.ru/software/220254/why-is-web-sql-database-deprecated

https://www.w3.org/TR/webdatabase/

https://coderoad.ru/29842481/HTML5-Web-SQL-%D1%80%D0%B0%D1%81%D0%BF%D0%BE%D0%BB%D0%BE%D0%B6%D0%B5%D0%BD%D0%B8%D0%B5-%D1%84%D0%B0%D0%B9%D0%BB%D0%B0-%D0%B1%D0%B0%D0%B7%D1%8B-%D0%B4%D0%B0%D0%BD%D0%BD%D1%8B%D1%85-%D0%B2-chrome

https://zen.yandex.ru/media/id/5cb259f3b5f77900b29df91a/web-sql-v-javascript-5ecc340887eb5a1725e2753f

https://www.tutorialspoint.com/html5/html5_web_sql.htm

https://coderlessons.com/tutorials/veb-razrabotka/vyuchit-html5/html5-baza-dannykh-web-sql