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  • Book Overview & Buying Getting Started with Knockout.js for .NET Developers
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Getting Started with Knockout.js for .NET Developers

Getting Started with Knockout.js for .NET Developers

By : Andrey Ankshin
4.2 (9)
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Getting Started with Knockout.js for .NET Developers

Getting Started with Knockout.js for .NET Developers

4.2 (9)
By: Andrey Ankshin
Buy this Book

Overview of this book

This book is intended for .NET developers who want to use the MVVM design pattern to create powerful client-side JavaScript linked to server-side C# logic. Basic experience with ASP.NET, Razor, and creating web applications is needed.
Table of Contents (9 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
Lock Free Chapter
1
1. Introduction to Knockout.js
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1. Introduction to Knockout.js
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Knockout.js overview
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Installing Knockout.js
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Knockout.js fundamentals
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Summary
2
2. Creating a Simple Knockout.js Application
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2. Creating a Simple Knockout.js Application
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Creating the Model, View, and ViewModel
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Text and appearance bindings
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Form fields bindings
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Control flow bindings
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Computed observables
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Observable arrays
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Summary
3
3. Integrating Knockout.js in ASP.NET MVC Applications
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3. Integrating Knockout.js in ASP.NET MVC Applications
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Creating an application without Knockout.js
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Creating an application with Knockout.js
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Summary
4
4. Creating a Web Application with Knockout MVC
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4. Creating a Web Application with Knockout MVC
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Getting started with Knockout MVC
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Working with the Hello World example in Knockout MVC
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Developing a Knockout MVC application
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Summary
5
5. Advanced Features of Knockout.js
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5. Advanced Features of Knockout.js
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Loading and saving JSON data
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Introducing Knockout mapping
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Binding context
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Custom bindings
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Extending observables
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Custom functions
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Different templating approaches
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Summary
6
6. Advanced Features of Knockout MVC
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6. Advanced Features of Knockout MVC
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Regions
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Complex bindings
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Sending parameters to the server
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Inner computed properties
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Multiple view models
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Lazy loading
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Writing user scripts
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Summary
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A. A Brief on Knockout MVC References and Features
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A. A Brief on Knockout MVC References and Features
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Working with KnockoutContext
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Basic data binding
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Form objects
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Nested contexts
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Sending requests to the server
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Adding user-defined scripts
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Forming a model and using computed properties
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Special addressing forms
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Summary
8
Index
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Index

Extending observables

Observables are a very useful and powerful part of Knockout.js. They allow you to create flexible and reliable applications. However, sometimes, you need to extend the opportunities of your observable properties. The extenders help you! As usual, let's proceed with some examples from the official documentation in detail.

Creating an extender

In this section, we will write a simple extender, as follows:

ko.extenders.logChange = function(target, option) { // 1
  target.subscribe(function(newValue) { // 2
    console.log(option + ": " + newValue); // 3
  });
  return target; // 4
};

Let's discuss it in detail:

  1. We use the ko.extenders object to create a new extender by adding a new property. In the preceding example, the property name is logChange. This extender will log any changes of the target binding value. In fact, an extender is just a function with two parameters. The first parameter (target) is the observable itself, the second parameter (option) is any option to define...

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