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POHow do I modify a template instance from an event handler in Meteor without Session?
 

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  1. POHow do I modify a template instance from an event handler in Meteor without Session?
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    <p>I am trying to implement a hierarchy of expandable post comments like in e.g. Quora, so that the user can click a comment and see any replies.</p> <p>To this end, I would like to keep track of whether each "comment" template instance is "expanded" or not, toggling the state in the event handler.</p> <p>I could do this using a whole stack Session variables (i.e. one for each comment), but this seems clumsy since there are an arbitrary number of comments on any given page.</p> <p>Below is a snippet of what I'm trying at the moment.</p> <p>JS:</p> <pre><code>Template.comment_item.events = { 'click #comment-content': function( e, instance ) { this.expanded = true; // also tried instance.data.expanded = true } }; Template.comment_item.helpers({ showChildComments: function(){ this.expanded; } }); </code></pre> <p>HTML:</p> <pre><code>&lt;template name="comment_item"&gt; &lt;li class="comment comment-displayed" id="{{_id}}"&gt; &lt;div class="comment-body"&gt; &lt;div id="comment-content"&gt; &lt;!-- some comment data here --&gt; &lt;/div&gt; {{#if showChildComments}} &lt;ul class="comment-children comment-list"&gt; {{#each child_comments}} {{&gt; comment_item}} {{/each}} &lt;/ul&gt; {{/if}} &lt;/div&gt; &lt;/li&gt; &lt;/template&gt; </code></pre> <p>Unfortunately, when I step through, it seems that in the showChildComments helper, the template instance can't see the expanded variable. I did notice in the docs it says instance.data is read only in the events map.</p> <p>Is there any way to modify the template instance within the event map directly?</p>
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    1. COWhats wrong with Session? You can also use JQuery in a more traditional way to go straight to the DOM the way quora does
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