Александр

const digitValues = new Uint8Array(16);
crypto.getRandomValues(digitValues);
const randomHash = hexValues = [...digitValues]
	.map(value => value.toString(16).padStart(2, '0'))
	.join('');

export const sum = (a, b) => a + b;
export const diff = (a, b) => a - b;

export const multiply = (a, b) => a * b;
export const divide = (a, b) => a / b;

export * as Mod1 from './mod1.js';
export * as Mod2 from './mod2.js';

import * as M from './module.js';

console.log(M.Mod1.sum(1, 2)); // 3
console.log(M.Mod2.multiply(5, 3)); // 15

/**
 * @param {MouseEvent} event
 */
function onButtonDown(event) {
    alert(event);
}

const unwrap = (element) => {
    element.replaceWith(...element.children);
};

unwrap(document.querySelector('.div'));

const button = document.querySelector('click', (event) => {
    event.preventDefault();
    button.textContent = 'пока';
}, { once: true });

const links = [...document.querySelectorAll('#filter_frm table')].reduce((acc, table) => {
	table.querySelectorAll('tr > td:last-child > a').forEach((link) => {
		if (link.textContent.includes('300  бр.')) { // /300\s+бр\./i.test(link.textContent)
			acc.push(link.href);
		}
	});

	return acc;
}, []);

console.log(links);

fetch('https://www.kartoteka.ru/')
    .then((response) => response.arrayBuffer())
    .then((buffer) => {
        let html = new TextDecoder('windows-1251').decode(buffer);
        let doc = new DOMParser().parseFromString(html, 'text/html');
        let b = doc.querySelectorAll(".news_item .image_block_no_image p")[0].innerHTML;

        console.log(b);
    });

const canvas = document.createElement('canvas');
const context = canvas.getContext('2d');
const lineWidth = 60;
const radius = 200;

[canvas.width, canvas.height] = [radius * 2, radius * 2];
context.beginPath();
context.arc(radius, radius, radius - lineWidth / 2, 0, Math.PI * 2);
context.closePath();
context.lineWidth = lineWidth;
context.stroke();

document.body.append(canvas);