diff --git a/src/scripts/main.js b/src/scripts/main.js
index a765fdb1d..f8094815a 100644
--- a/src/scripts/main.js
+++ b/src/scripts/main.js
@@ -1,3 +1,245 @@
 'use strict';
 
-// write code here
+const table = document.querySelector('table');
+const tBody = table.tBodies[0];
+const body = document.querySelector('body');
+
+table.addEventListener('click', (e) => {
+  const target = e.target.closest('th');
+  const tbody = table.tBodies[0] || table;
+  let rows = [];
+
+  if (!target) {
+    return;
+  }
+
+  const columnIndex = target.cellIndex;
+
+  const currentDir = target.dataset.order;
+  const sortDirection = currentDir === 'asc' ? 'desc' : 'asc';
+
+  table
+    .querySelectorAll('th')
+    .forEach((th) => th.removeAttribute('data-order'));
+
+  target.dataset.order = sortDirection;
+
+  rows = Array.from(tbody.rows);
+
+  rows.sort((a, b) => {
+    if (/\d/.test(a.cells[columnIndex].textContent)) {
+      const aNum = parseFloat(
+        a.cells[columnIndex].textContent.replace(/[^\d.-]/g, ''),
+      );
+      const bNum = parseFloat(
+        b.cells[columnIndex].textContent.replace(/[^\d.-]/g, ''),
+      );
+
+      if (sortDirection === 'asc') {
+        return aNum - bNum;
+      } else {
+        return bNum - aNum;
+      }
+    }
+
+    const aText = a.cells[columnIndex].textContent.trim();
+    const bText = b.cells[columnIndex].textContent.trim();
+
+    if (sortDirection === 'asc') {
+      return aText.localeCompare(bText);
+    } else {
+      return bText.localeCompare(aText);
+    }
+  });
+
+  rows.forEach((row) => tbody.appendChild(row));
+});
+
+let activeRow = null;
+
+table.tBodies[0].addEventListener('click', (e) => {
+  const target = e.target.closest('tr');
+
+  if (target) {
+    if (activeRow) {
+      activeRow.classList.remove('active');
+    }
+    target.classList.add('active');
+    activeRow = target;
+  }
+});
+
+const form = document.createElement('form');
+
+form.classList.add('new-employee-form');
+form.action = '#';
+form.method = 'POST';
+
+const fields = [
+  { label: 'Name', name: 'name', type: 'text' },
+  { label: 'Position', name: 'position', type: 'text' },
+  {
+    label: 'Office',
+    name: 'office',
+    type: 'select',
+    options: [
+      `Tokyo`,
+      `Singapore`,
+      `London`,
+      `New York`,
+      `Edinburgh`,
+      `San Francisco`,
+    ],
+  },
+  { label: 'Age', name: 'age', type: 'number' },
+  { label: 'Salary', name: 'salary', type: 'number' },
+];
+
+fields.forEach((field) => {
+  const label = document.createElement('label');
+
+  label.textContent = `${field.label}: `;
+
+  let element;
+
+  if (field.type === 'select') {
+    element = document.createElement('select');
+    element.name = field.name;
+    element.required = true;
+
+    field.options.forEach((optText) => {
+      const option = document.createElement('option');
+
+      option.value = optText;
+      option.textContent = optText;
+      element.appendChild(option);
+    });
+  } else {
+    element = document.createElement('input');
+    element.name = field.name;
+    element.type = field.type;
+    element.required = true;
+  }
+
+  element.setAttribute('data-qa', field.name);
+  label.appendChild(element);
+  form.appendChild(label);
+});
+
+const submitBtn = document.createElement('button');
+
+submitBtn.type = 'submit';
+submitBtn.textContent = 'Save to table';
+form.appendChild(submitBtn);
+
+body.appendChild(form);
+
+form.addEventListener('submit', (e) => {
+  e.preventDefault();
+
+  const formData = new FormData(form);
+  const employee = Object.fromEntries(formData.entries());
+
+  if (checkValidation(employee)) {
+    addEmployeeToTable(employee);
+
+    pushNotification(
+      20,
+      20,
+      'Success',
+      'Employee added successfully',
+      'success',
+    );
+    form.reset();
+  }
+});
+
+function addEmployeeToTable(employee) {
+  const newRow = document.createElement('tr');
+  const formattedSalary = Number(employee.salary).toLocaleString('en-US');
+
+  newRow.innerHTML = `
+    <td>${employee.name}</td>
+    <td>${employee.position}</td>
+    <td>${employee.office}</td>
+    <td>${employee.age}</td>
+    <td>$${formattedSalary}</td>
+  `;
+  tBody.appendChild(newRow);
+}
+
+function checkValidation(employee) {
+  if (employee.name.length < 4) {
+    pushNotification(
+      20,
+      20,
+      'Validation Error',
+      'Name must be at least 4 characters long',
+      'error',
+    );
+
+    return false;
+  }
+
+const age = Number(employee.age);
+
+  if (age < 18 || age > 90) {
+    pushNotification(
+      20,
+      20,
+      'Validation Error',
+      'Age must be between 18 and 90',
+      'error',
+    );
+
+    return false;
+  }
+
+  return true;
+}
+
+const pushNotification = (posTop, posRight, title, description, type) => {
+  const notification = document.createElement('div');
+
+  notification.classList.add('notification', type);
+  notification.setAttribute('data-qa', 'notification');
+  notification.style.top = posTop + 'px';
+  notification.style.right = posRight + 'px';
+
+  const notificationTitle = document.createElement('h2');
+
+  notificationTitle.classList.add('title');
+  notificationTitle.textContent = title;
+  notification.appendChild(notificationTitle);
+
+  const notificationDescription = document.createElement('p');
+
+  notificationDescription.textContent = description;
+  notification.appendChild(notificationDescription);
+
+  document.body.appendChild(notification);
+
+  setTimeout(() => {
+    notification.remove();
+  }, 2000);
+};
+
+form.addEventListener(
+  'invalid',
+  (e) => {
+    e.preventDefault();
+
+    const input = e.target;
+    const fieldName = input.name;
+    const errorMessage = input.validationMessage;
+
+    pushNotification(
+      20,
+      20,
+      'Validation Error',
+      fieldName + ': ' + errorMessage,
+      'error',
+    );
+  },
+  true,
+);