Patches the default document.createElement function to follow the JSX/React.createElement function signature.

jsx-create-element.js

var createElement = document.createElement.bind(document);

function appendChild(child) {
  this.appendChild(
    child instanceof Element ? child : document.createTextNode(child)
  );
}

document.createElement = function(tagName, attrs, children) {
  var el = createElement(tagName);

  if (attrs) {
    Object.keys(attrs).forEach(function(attr) {
      el.setAttribute(attr, attrs[attr])
    });
  }

  if (children) {
    if (children.forEach) children.forEach(appendChild, el);
    else appendChild.call(el, children);
  }

  return el;
};