Александр

const format = (date) => {
  const formatted = date.toLocaleString('ru-RU', {
    weekday: 'long',
    day: 'numeric',
    month: 'long',
  });
  
  return `${formatted[0].toUpperCase()}${formatted.slice(1)}`;
};

const today = Date.now();
const day = 24 * 60 * 60 * 1000;
const tomorrow = format(new Date(today + day));
const dayAfterTomorrow = format(new Date(today + day * 2));

console.log(tomorrow); // 'Вторник, 6 июля'
console.log(dayAfterTomorrow); // 'Среда, 7 июля'

const formatter = new Intl.DateTimeFormat('ru-RU', {
    weekday: 'long',
    day: 'numeric',
    month: 'long',
});

const format = (date) => {
  const formatted = formatter.format(date);
  
  return `${formatted[0].toUpperCase()}${formatted.slice(1)}`;
};

const today = Date.now();
const day = 24 * 60 * 60 * 1000;
const tomorrow = format(new Date(today + day));
const dayAfterTomorrow = format(new Date(today + day * 2));

console.log(tomorrow); // 'Вторник, 6 июля'
console.log(dayAfterTomorrow); // 'Среда, 7 июля'

document.querySelectorAll('ul li a').forEach((link, index) => {
   link.addEventListener('click', () => {
       console.log('Index is', index);
   });
});

document.querySelectorAll('a').forEach(link => {
   link.addEventListener('click', event => {
       const parent = event.target.closest('li');
       if (parent !== null) {
           const items = [...parent.parentElement.children];
           const index = items.indexOf(parent);
           console.log('Index is', index);
       }
   });
});

/(ShowMaker|Chapionships|Markerwons|Lee-Broks|All-Mars)\s(\d{4})\s((((([5-9]|10)(\.\d)?)|(11(\.[0-5])?))\sUK)|(((3[5-9]|4[0-4])(\.\d)?|45)\sRU))/

(() => {
	const expression = /(ShowMaker|Chapionships|Markerwons|Lee-Broks|All-Mars)\s(\d{4})\s((((([5-9]|10)(\.\d)?)|(11(\.[0-5])?))\sUK)|(((3[5-9]|4[0-4])(\.\d)?|45)\sRU))/;

	const brands = ['ShowMaker', 'Chapionships', 'Markerwons', 'Lee-Broks', 'All-Mars'];

	const round = (number) => Math.round(number * 10) / 10;

	for (const brand of brands) {
		console.group(brand);
		console.group('UK');
		console.time();
		for (let size = 5; size <= 11.5; size += 0.1) {
			const variant = `${brand} 0000 ${round(size)} UK`;
			console.assert(expression.test(variant), variant);
		}
		console.timeEnd();
		console.groupEnd();

		console.group('RU');
		console.time();
		for (let size = 35; size <= 45; size += 0.1) {
			const variant = `${brand} 0000 ${round(size)} RU`;
			console.assert(expression.test(variant), variant);
		}
		console.timeEnd();
		console.groupEnd();
		console.groupEnd();
	}
})();

//здесь мог быть ваш код

- res.writeHead(200, { 'Content-Type': 'text/plain' });
+ res.writeHead(200, {
+     'Content-Type': 'text/plain',
+     'Access-Control-Allow-Origin': '*'
+ });

/^([A-Za-z]{3})-(?!315|777)(\d{1,3}|1000)-([А-ЯЁ]{1,3})$/

/^([A-Za-z]{3})-(?!315|777)(\d{1,3})-([А-ЯЁ]{1,3})$/

/^(([A-Za-z]{3})-(?!315|777)(\d{1,3})-([А-ЯЁ]{1,3})\s?)+$/

input.addEventListener('input', event => {
    const element = event.target;
    const currentValue = element.value;
    const preparedValue = currentValue.replace(/\D/g, '');
    const start = element.selectionStart;
    const end = element.selectionEnd;
    
    if (preparedValue !== currentValue) {
        element.value = preparedValue;
        element.dispatchEvent(new Event('change', { bubbles: true }));
    
        if (event.inputType === 'insertText') {
            const offset = event.data.length;

            element.setSelectionRange(start - offset, end - offset);
        }
    }
});