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MASTERING KNOCKOUTJS

By : Moran

4.7 (6)

MASTERING KNOCKOUTJS

4.7 (6)

By: Moran

Overview of this book

If you are an experienced JavaScript developer who is looking for new tools to build web applications and get an understanding of core elements and applications, this is the book for you. A basic knowledge of DOM, JavaScript, and KnockoutJS is assumed.

Preface

Preface

A note on Knockout 3.2

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Knockout Essentials

1. Knockout Essentials

The environment setup

An overview of Knockout

Observables

Defining viewmodels

The data-bind syntax

Control flow bindings

Template binding

Containerless control flow

Extenders

The Contacts List application

Summary

2. Extending Knockout with Custom Binding Handlers

2. Extending Knockout with Custom Binding Handlers

The data binding pattern

Components of a binding handler

Simple binding handlers

Advanced binding handlers

Containerless syntax with custom bindings

Summary

3. Extending Knockout with Preprocessors and Providers

3. Extending Knockout with Preprocessors and Providers

Binding the handler preprocessing

Node preprocessors

Binding providers

Knockout punches

Summary

4. Application Development with Components and Modules

4. Application Development with Components and Modules

RequireJS – AMD viewmodels

Components

Single Page Application (SPA) routing

Summary

5. Durandal – the Knockout Framework

5. Durandal – the Knockout Framework

An overview of the Durandal framework

The composition system

Using the router

Modal dialogs

The application's life cycle

Widgets

Summary

6. Advanced Durandal

6. Advanced Durandal

Publishing and subscribing

Handling logins

Guarded routes

Advanced composition

Child routers

Custom modal dialogs

Using activators

Binding to plain JavaScript objects

Summary

7. Best Practices

7. Best Practices

Sticking to MVVM

Using service modules

Creating small modules

Writing unit tests

Singleton versus instance

Calling ko.applyBindings once (per root)

Performance concerns

Summary

8. Plugins and Other Knockout Libraries

8. Plugins and Other Knockout Libraries

Knockout Validation

Knockout Mapping

Knockout Kendo

KoGrid

Knockout Bootstrap

Knockout Switch-Case

Knockout Projections

Knockout-ES5

Summary

9. Under the Hood

9. Under the Hood

Dependency tracking

The prototype chain

The binding expression parser

Applying bindings

Templates

The ko.utils reference

Summary

Index

Index

Binding the handler preprocessing

So far, we have looked at two properties of binding handlers: the init and update functions. Binding handlers have another optional function, which is preprocess, that is run before the init function. A preprocessor's purpose is to modify the data-binding attribute before Knockout determines what bindings are to be applied.

Preprocessors don't deal with elements or binding contexts; they just deal with the strings that the binding will evaluate. For example, if we had a preprocessor that converts all text bindings to uppercase, then the following span element will be processed:

<span data-bind="text: 'That Guy'"></span>

This span element would be processed as if it was written like this:

<span data-bind="text: 'That Guy'.toUpperCase()"></span>

If you were to inspect the HTML after this, you will still see the original data-bind attribute. This is because preprocessors don't actually...

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