TL;DR
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/515720/1477822/util.js
// ==UserScript==
// @name util
// @license MIT
// @description TL;DR
// @author https://greasyfork.org/ja/users/705684
// @grant none
// ==/UserScript==
(function() {
'use strict';
/**
* format to HH:MM:SS
* @param {Date} date JavaScript Date object
* @return {string} HH:MM:SS
*/
window.formatTime = date => {
let d = date && date !== 0 ? new Date(date) : Date.now();
d /= 1000;
const s = (d | 0) % 60;
d /= 60;
d -= new Date().getTimezoneOffset();
const m = (d | 0) % 60;
d /= 60;
const h = (d | 0) % 24;
return [h, m, s].map(v => v.toString().padStart(2, '0')).join(':');
};
/**
* calc PseudoRandom from seed
* @param {string} seed
* @return {number} 0 <= x < 1
*/
window.pseudoRandomBy = async seed => {
const [a, b] = new Uint8Array(await window.crypto.subtle.digest('SHA-1', (new TextEncoder()).encode(seed)));
const unique = (a << 8) + b;
return unique / 0x10000;
};
})();