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POSetting observable from select list in knockout.js
 

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    <p>I'm trying to use the value of a select list for a calculation but I can't get it to retrieve the number when it's selected. </p> <p>When I return the selected quantity it returns some javascript instead of the number</p> <p>selectedQuantity is the value I'm trying to retrieve.</p> <pre><code>&lt;table border="1"&gt; &lt;thead&gt;&lt;tr&gt; &lt;th&gt;ID&lt;/th&gt;&lt;th&gt;Inventory&lt;/th&gt;&lt;th&gt;Quantity&lt;/th&gt;&lt;th&gt;Price&lt;/th&gt;&lt;th&gt;Total&lt;/th&gt;&lt;th&gt;&lt;/th&gt; &lt;/tr&gt;&lt;/thead&gt; &lt;tbody data-bind="foreach: itemNumbers"&gt; &lt;tr&gt; &lt;td data-bind="text: ID"&gt;&lt;/td&gt; &lt;td data-bind="text: inventory"&gt;&lt;/td&gt; &lt;td&gt;&lt;select data-bind="quantityDropdown: inventory, value: selectedQuantity"&gt;&lt;/select&gt;&lt;/td&gt; &lt;td data-bind="text: formattedPrice"&gt;&lt;/td&gt; &lt;td data-bind="text: itemTotal"&gt;&lt;/td&gt; &lt;td&gt;&lt;a href="#" data-bind="click: $root.removeItem"&gt;Remove&lt;/a&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/tbody&gt; &lt;/table&gt; </code></pre> <p>Here's the javascript</p> <pre><code>function ItemEntry(ID, inventory, price) { var self = this; self.ID = ID; self.inventory = inventory; self.price = price; self.selectedQuantity = ko.observable(); //returned value (trying to get it at least!) self.itemTotal = ko.computed(function() { var price = self.price; var quantity = self.selectedQuantity; return quantity; //just returning quantity for now to verify correct value is selected }); self.formattedPrice = ko.computed(function() { var price = self.price; return price ? "$" + price.toFixed(2) : "None"; }); } function EntryViewModel(newItem) { var self = this; self.newItem = newItem; //start the array with some items self.itemNumbers = ko.observableArray([ new ItemEntry("1", 20, 22.50) //ID, inventory, price ]); // Computed data self.totalCost = ko.computed(function() { var total = 0; for (var i = 0; i &lt; self.itemNumbers().length; i++) { total += Number(self.itemNumbers()[i].price); } return total; }); self.removeItem = function(item) { self.itemNumbers.remove(item) } } //populate the select list with values up to the number in inventory (ex, if inventory is 3, it will fill with 0-7) ko.bindingHandlers.quantityDropdown = { update: function(quantityDropdown, inventory, EntryViewModel) { var quantity = ko.utils.unwrapObservable(inventory()); for(var i = 0; i &lt;= inventory(); i++){ $(quantityDropdown).append('&lt;option value="' + i + '"&gt;' + i + '&lt;/option&gt;'); } } }; ko.applyBindings(new EntryViewModel()); </code></pre>
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