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MASTERING KNOCKOUTJS

You're reading from   MASTERING KNOCKOUTJS Use and extend Knockout to deliver feature-rich, modern web applications

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Product type Paperback
Published in Nov 2014
Publisher
ISBN-13 9781783981007
Length 270 pages
Edition 1st Edition
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Author (1):
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Timothy Moran Timothy Moran
Author Profile Icon Timothy Moran
Timothy Moran
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Table of Contents (11) Chapters Close

Preface 1. Knockout Essentials 2. Extending Knockout with Custom Binding Handlers FREE CHAPTER 3. Extending Knockout with Preprocessors and Providers 4. Application Development with Components and Modules 5. Durandal – the Knockout Framework 6. Advanced Durandal 7. Best Practices 8. Plugins and Other Knockout Libraries 9. Under the Hood Index

Binding providers

With a binding preprocessor, we have access to the binding expression and can modify it before the evaluation of bindings. With a node preprocessor, we have access to the node and can modify the DOM before bindings are applied. Both of these just transform things into the normal Knockout syntax. They are also limited to operating on the DOM, and they do not have access to the binding context.

Knockout binding providers are objects that receive both the DOM node and the binding context and determine which bindings handlers will be applied and what valueAccessor properties those bindings receive.

A binding provider is expected to provide the following functions:

  • nodeHasBindings(node): This function should return a Boolean that indicates whether or not the node has any bindings defined on it.
  • getBindingAccessors(node, bindingContext): This function should return an object with a property for each binding to be applied whose value is a function that evaluates the binding expression...
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