Tag: component

You’ve created a nice feature leveraging Knockout.js and now you want to re-use this feature on another page, another site, or in a slightly different fashion. This example will extend the previous (Un)Check All using Knockout.js and make it easily re-usable.

A Knockout component can be created using a mixture of HTML (with data bindings) and a Knockout ViewModel. By altering the previous check all example and making it slightly more re-usable, it can be easily added to other pages with minimal effort. If you are not already familiar with the example being extended, please take a minute and give the Knockout js tutorial a quick read with the link provided above.

Once the component is created, it can be included on any page with this simple HTML:

<checkall params=”items: items, selectedItems: selectedItems”></checkall>

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When I wrote Knockout.js: Building Dynamic Client-Side Web Applications I was trying to focus on demonstrating specific things, such as custom bindings, extending observables, etc. Unfortunately this didn’t leave room for what I would call “random” examples of things that I do on a semi-regular basis. This blog post will demonstrate how to create a (un)check all list of checkboxes.

If I haven’t said it before, Knockout js examples like this are why I love working with this framework on a daily basis. This example is accomplished in under 50 lines of code, with most of it being whitespace for readability!

The following example assumes you understand how to install Knockout.js and have a brief understanding of Knockout ViewModels. If you are looking for a good introduction *cough* *cough*, my book does an excellent job of it 😉

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