SQL is converted to API call in client side. sql-to-api-js converts SQL to JavaScript and fetch complete query.
SELECT * FROM users => fetch('/api/users')
SELECT * FROM users WHERE name=Jack => fetch('/api/users&name=Jack')
SELECT * FROM users WHERE name=Jack ORDER BY age => fetch('/api/users&name=Jack').sort((userA,userB) => userA.age-userB.age)