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A comment on The future of web software is HTML over WebSockets. Parent comment
1) Nothing bad can happen if we show some optimistic result before server returns, but server side will end up in different result.
2) Something bad can happen. Accordingly, for (1) we can do optimistic update, for (2) can't
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1) Nothing bad can happen if we show some optimistic result before server returns, but server side will end up in different result.
2) Something bad can happen. Accordingly, for (1) we can do optimistic update, for (2) can't