Retrieve the updated value of an item in a knockout observable array during a change event

Currently, I am utilizing knockout.js to create an editable table and I am attempting to trigger a validation function whenever the value of an input field within the table is modified.

I have experimented with utilizing an editable computed observable as suggested in the response by mhu on this Stack Overflow post: change event on select with knockout binding, how can i know if its a real change

I have also explored using observable extenders in accordance with the documentation found on Knockout's official website: KO Extenders

In addition, I have attempted to utilize the change event by referencing this JSFiddle example: JSFiddle!

After trying these methods, I consistently find that only the original value is being retrieved.

Is there a conventional method to capture the new value of an item within an observableArray in order to validate it? Shouldn't this be a basic functionality within Knockout.js?

javascriptdomknockout.jsobservable

Answer №1

Modify your data binding statement from

data-bind="attr: { value: itemValue }, event: { change: $parent.itemChanged }"

to

data-bind="value: itemValue, event: { change: $parent.itemChanged }"

working demo: http://jsfiddle.net/hztaS/

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