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Customize and Create JavaScript
This works well for any data type except arrays. If the observable contains an array
or an object, a regular knockout observable does not trigger updates when values
within the array change.
For this reason ko.observableArray([]) should be used when working with
arrays.
There also are observable functions, which are called “computed
observables” and are created with a call to ko.computed(callback) or
ko.pureComputed(callback).
Magento also includes the knockout plugkn ko-es5. The benefit of ko-es5 is that it
allows the creation of observables that can be read and set like regular properties,
while knockout still tracks the changes under the hood.
You can use the observable’s subscribe method to listen to changes. The
real value of the observable comes out when you bind that to an element in the
template like:
What common ko bindings are used?
See above section for a list of common ko bindings.
Demonstrate an understanding of ko virtual elements.
Virtual elements are a way to bind a child element without having to insert a node
into the DOM just to specify the binding.
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