Author Archives: Dhananjay Kumar

Create a Router in Node.js using crossroads

Routers are very important in any web server. Primary function of a Router is to accept request and on basis of requested URL trigger desired process. Consider a rough example in that client is requesting http://abc.com/users/myprofile and there request may serve from URL http://abc.com/node/2 assuming user is stored in node with id 2. In Node.jsContinueContinue reading “Create a Router in Node.js using crossroads”

Error: `doctype 5` is deprecated, you must now use `doctype html`: Node.js Express App bug solved

I am using Visual Studio to create Node.js application. I created a Node project by selecting Blank Express Application project template from JavaScript project type. After creating project I pressed F5 to run application. On running application I got following error Solving this error is very easy. From views folder in project open layout.jade. YouContinueContinue reading “Error: `doctype 5` is deprecated, you must now use `doctype html`: Node.js Express App bug solved”

Control Flow bindings in Knockout.js

You can control flow of element on the view using Control Flow bindings of Knockout.js. There are four Control Flow bindings foreach binding if binding ifnot binding with binding Out of these four bindings foreach and if bindings are used very often. foreach binding foreach binding repeat same markup for number of times equivalent toContinueContinue reading “Control Flow bindings in Knockout.js”

How to upload file in Node.js

In this post we will take a look on uploading a file on a web server created using Node.js. stream in Node.js makes this task super easy to upload files or for that matter working with any data transfer in between server and client. To upload file we will work with two modules http andContinueContinue reading “How to upload file in Node.js”

Create Echo Server in Node.js

Creating HTTP server in Node.js is very simple. In this post we will learn to create an echo server using Node.js. Before we move ahead, let us understand what an echo server is. In echo server, client sends data to server and server returns back same data to server. To create echo server, let usContinueContinue reading “Create Echo Server in Node.js”

Computed Observable in Knockout.js

In this post we will take a look on Computed Observable in Knockout.js. Let us start with an example, you have a ViewModel Now you want a custom message to be rendered on the view, that message will depend on other observable of ViewModel. To create that custom message you need to create a ComputedContinueContinue reading “Computed Observable in Knockout.js”

Why we need Observable Properties in Knockout.js

In this post we will take a look on why we need observable properties in Knockout.js Before you read further this blog post, I would recommend you to read Setting up Visual Studio for Knockoutjs Development Create your First MVVM based JavaScript App in two simple steps using Knockoutjs Inbuilt Bindings in Knockout.js: Controlling TextContinueContinue reading “Why we need Observable Properties in Knockout.js”