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POUsing knockout to determine the first element in a foreach
 

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  1. POUsing knockout to determine the first element in a foreach
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    <p>In a knockout template binding process, I need to detect when I am processing the first element in each row as it should not have the anchor tag surrounding it.</p> <p>Given the following js for knockout...</p> <pre><code>function Model() { var self = this; self.gridData = ko.observableArray('{"GridData":[["Category foo","0","0"],["Category bar","0","0"]]}'); } var model = new Model(); ko.applyBindings(model); </code></pre> <p>and this template...</p> <pre><code>&lt;script type="text/html" id="template"&gt; &lt;table&gt; &lt;tbody data-bind="foreach: gridData"&gt; &lt;tr data-bind="foreach: $data"&gt; &lt;td&gt;&lt;a href="" data-bind="text: $data"&gt;&lt;/a&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/tbody&gt; &lt;/table&gt; &lt;/script&gt; </code></pre> <p>and this html...</p> <pre><code>&lt;div data-bind="template: { name: 'template' }"&gt;&lt;/div&gt; </code></pre> <p>Can the 'if' binding be used in some way that runs true if we are processing the 1st element?</p> <p>Also, I found this <a href="https://stackoverflow.com/questions/5371772/knockout-js-foreach-but-with-a-special-element-first">SO Post</a>, but it doesn't get me quite what I am looking for.</p> <p><strong>UPDATE:</strong></p> <p>Thanks for both answers. Using the info provided in each, I was able to find a good solution for my situation. I updated my template to the below...</p> <pre><code>&lt;script type="text/html" id="template"&gt; &lt;tbody data-bind="foreach: gridData"&gt; &lt;tr data-bind="foreach: $data"&gt; &lt;!-- ko if:($index()===0) --&gt; &lt;td data-bind="text: $data"&gt;&lt;/td&gt; &lt;!-- /ko --&gt; &lt;!-- ko ifnot:($index()===0) --&gt; &lt;td&gt;&lt;a href="" data-bind="text: $data"&gt;&lt;/a&gt;&lt;/td&gt; &lt;!-- /ko --&gt; &lt;/tr&gt; &lt;/tbody&gt; &lt;/script&gt; </code></pre>
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