How to create new div dynamically, change it, move it, modify it in every way possible, in JavaScript?

• Creation var div = document.createElement('div');
• Addition document.body.appendChild(div);
• Style manipulation
  • Positioning div.style.left="32px"; div.style.top = '-16px';
  • Classes div.className="ui-modal";
• Modification
  • ID div.id = 'test';
  • contents (using HTML) div.innerHTML = '<span class="msg">Hello world.</span>';
  • contents (using text) div.textContent="Hello world.";
• Removal div.parentNode.removeChild(div);
• Accessing
  • by ID div = document.getElementById('test');
  • by tags array = document.getElementsByTagName('div');
  • by class array = document.getElementsByClassName('ui-modal');
  • by CSS selector (single) div = document.querySelector('div #test .ui-modal');
  • by CSS selector (multi) array = document.querySelectorAll('div');
• Relations (text nodes included)
  • children node = div.childNodes[i];
  • sibling node = div.nextSibling;
• Relations (HTML elements only)
  • children element = div.children[i];
  • sibling element = div.nextElementSibling;

This covers the basics of DOM manipulation. Remember, element addition to the body or a body-contained node is required for the newly created node to be visible within the document.