cacheControl: 'no-cache'
をつければキャッシュしなくできる。
Storage.get(post_to_display.id, {
level: 'public',
cacheControl: 'no-cache',
download: true,
}).then(async (result: any) => {
const text = await result.Body?.text();
set_body_html(text);
});
https://github.com/aws-amplify/amplify-js/issues/6413#issuecomment-720499530