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In this doc : .html iteration is achieved using the 'foreach' binding :

<tbody data-bind="foreach: people">

Is it possible to access the size of this binding via javascript/jquery ?

Something like : alert('People size is '+people.size);

I need to access the size in order to do a simple validation check.

In this doc : http://knockoutjs./documentation/foreach-binding.html iteration is achieved using the 'foreach' binding :

<tbody data-bind="foreach: people">

Is it possible to access the size of this binding via javascript/jquery ?

Something like : alert('People size is '+people.size);

I need to access the size in order to do a simple validation check.

• javascript
• jquery
• knockout.js

Share Improve this question Follow asked Mar 7, 2013 at 13:00 blue-skyblue-sky 53.9k161161 gold badges466466 silver badges780780 bronze badges 3

• when/where do you want to know that? – Daniel A. White Commented Mar 7, 2013 at 13:00
• do you have access to the view model in that context? – Daniel A. White Commented Mar 7, 2013 at 13:06
• console.log(self.people().length); in your JS model. Just of the top of my head so haven't checked. – rkeet Commented Mar 7, 2013 at 13:06

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1 Answer 1

Sorted by: Reset to default 18

Do you mean within the foreach itself? You can call the parent in the loop, then access the observable array again:

$parent.people().length

Or anywhere you have bound your view model, you can call:

people().length

Or you can add a puted observable to your view model. Inside your view model code, assign this to a var named self, then:

var peopleCount = ko.puted(function()
{
    return self.people().length;
}

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