t_wの輪郭

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