Тигран Абрамян

$('#filter').on('input', function() {
	$('#ffilter').val($(this).val());
});

$('#ffilter').on('input', function() {
	$('#filter').val($(this).val());
});

const select = document.querySelector('#select');

for (let i = 1; i <= 100; i++) {
  const option = document.createElement('option');
  option.textContent = option.value = i;
  select.append(option);
}

const div = document.querySelectorAll('div');
const colors = [ 'red','blue','yellow','green' ];

div.forEach((el, index) => {
  el.style.width = '200px';
  el.style.height = '50px';
  el.style.border = '1px solid gray'
  el.style.backgroundColor = colors[index];
});

$('#rooms label:last-child').on('click', function() {
  $('#rooms label:not(:last-child)').css('background', 'green');
});

let filteredObj = {};

for (let [ key, value ] of Object.entries(obj)) {
  if (array.includes(value)) {
    filteredObj[key] = value;
  }
}

const filteredObj = Object.entries(obj).reduce((acc, [ key, value ]) => ((array.includes(value) ? acc[key] = value : null), acc), {});

<form>
  <input type="text" id="input">
</form>

<p id="demo"></p>

input.addEventListener('input', function () {
  if (this.value.length > 140) {
    demo.textContent = 'Ваш текст';
  } else {
    demo.textContent = '';
  }
});

$('#input').on('input', function() {
  if ($(this).val().length > 140) {
    $('#demo').text('Ваш текст');
  } else {
    $('#demo').text('');
  }
});

const $navLink = $('.nav__link');
const activeClass = 'active';
const navClass = localStorage.getItem('add-class');

if (navClass) {
  $navLink
    .removeClass(activeClass)
    .eq(navClass)
    .addClass(activeClass);
}

$navLink.on('click', function() {
  $navLink.removeClass(activeClass);
  $(this).addClass(activeClass);
  localStorage.setItem('add-class', $(this).index());
});

const moveToLeft = (arr, n) => [ ...arr.splice(n), ...arr ];

const moveToStart = (arr, n) => [ ...arr.splice(-n), ...arr ];

document.querySelectorAll('h2').forEach(h => {
  if (h.innerText === 'тест') {
    h.style.display = 'none';
  }
});

for (let i = 0; i < record.messages.length; i++) {
	console.log(record.messages[i].text);
}

str.replace(str.slice(0, -4), 'текст на который хотите заменить');