bookmarklet.js
{
// 前後１時間
const toUTC = (dt) => {
    const isoString = dt.toISOString();
    return isoString.replace('T','_').split('.')[0] + '_UTC';
}    
const dt = document.querySelectorAll('time')[0].dateTime;
const t = Date.parse(dt);
const anHourAgo = new Date(t - (3600 * 1000));
const anHourLate = new Date(t + (3600 * 1000));
console.log(`${anHourAgo.toLocaleString()}～${anHourLate.toLocaleString()}`);
const url = document.querySelectorAll('link[rel=canonical]')[0].href;
const userName = url.split('/')[3];
const queryValue = `from:${userName} since:${toUTC(anHourAgo)} until:${toUTC(anHourLate)} include:nativeretweets`;
const queryEncoded = encodeURIComponent(queryValue);
const href = `https://twitter.com/search?q=${queryEncoded}&src=typed_query&f=top`;
document.location.href = href; 
}