Target pseudo-class

This pseudo-class is called target pseudo-class and represents an element which matches against fragment identifier of the URI. For example an URI is pointing to anchor named partHelp like here: the element with the ID partHelp will be selected by this selector.

:target {
    /* declarations */}


:target {
    outline: red dotted;

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Error handling with ExpressJS

Error Handling refers to how Express catches and processes errors...

app.get('/', function (req, res, next) {
  fs.readFile('/file-does-not-exist', function (err, data) {

How to write middleware for Express.Js apps

Middleware functions are functions that have access to the request...

var logger = function (req, res, next) {