hansamlin

DOM Performance

• How the browser renders the document
  • Receives the data (bytes) from the server.
  • Parses and converts into tokens (<, TagName, Attribute, AttributeValue, >).
  • Turns tokens into nodes.
  • Turns nodes into the DOM tree.
• Builds CSSOM tree from the css rules.

hansamlin

// Set an error message and redirect
var redirectWithMessage = function (message, url, req, res) {
  req.session.messages = message;
  res.redirect(url);
};

// Return 'messages' value or null instead
var getMessages = function (req) {
  var messages = req.session.messages || null;
  delete req.session.messages;