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POKnockoutJS subscribe to property changes with Mapping Plugin
 

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    <p>Is there anyway I can tell the knockout mapping plugin to subscribe to all property changes call a certain function?</p> <p>I realize I can manually subscribe to the property change event in this manner:</p> <pre><code>var viewModel = { name: ko.observable('foo'), } // subscribe manually here viewModel.name.subscribe(function(newValue){ // do work }) </code></pre> <p>I would like to be able to generically subscribe though, since my view models may vary, I don't want to hardcode the property names. I created a function that does this, but it may not be the best approach. It works over all browsers except IE7 and below.</p> <p>Here I take a viewmodel as an argument and try to reflect on it subscribing to the properties:</p> <pre><code>function subscribeToKO(data) { $.each(data, function (property, value) { if (getType(value) == "Object") data[property] = subscribeToKO(value); else if (getType(value) == "Array") { $.each(value, function (index, item) { item = subscribeToKO(item); }); } else { if (value.subscribe) { value.subscribe(function (newValue) { // do work }); } } }); return data; } </code></pre> <p>Like I said this works, but since I am using the mapping pluging I was hoping there was a hook I could use to provide it with a function that will generically subscribe to property changes.</p> <p>Something like:</p> <pre><code>mapping = { create: function(options){ options.data.subscribe(function(newValue){ // do work ??? }); } } ko.mapping.fromJS(viewModel, mapping); </code></pre> <p>Any ideas?</p>
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