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    <p>You're not going to be able to use <code>id</code> attributes to identify your templates without a bunch of server-side processing to take care of the uniqueness issues. But you can use classes to identify your templates.</p> <p>If you mash all your template HTML files together in override order ("base" templates first, "subtemplates" after) and use <code>class</code> attributes to identify the templates:</p> <pre><code>&lt;!-- templates.html --&gt; &lt;script type="text/template" id="fooTemplate"&gt; &lt;div class="foo"&gt; &lt;/div&gt; &lt;/script&gt; &lt;script type="text/template" id="barTemplate"&gt; &lt;p&gt;Bar!&lt;/p&gt; &lt;/script&gt; &lt;!-- newTemplates.html --&gt; &lt;script type="text/template" id="fooTemplate"&gt; &lt;ul class="foo"&gt; &lt;li class="bar"&gt;Blah!&lt;/li&gt; &lt;/ul&gt; &lt;/script&gt; </code></pre> <p>Then you can use things like</p> <pre><code>var foo = _.template($('.fooTemplate:last').html()); var bar = _.template($('.barTemplate:last').html()); </code></pre> <p>to access your templates.</p> <p>Demo: <a href="http://jsfiddle.net/ambiguous/gYHkF/" rel="nofollow">http://jsfiddle.net/ambiguous/gYHkF/</a></p> <hr> <p>You could also stick with <code>id</code>s and try to load templates from <code>newTemplates.html</code> first and fallback to <code>templates.html</code> if you don't find it. If you load the template files into two separate variables but <strong>don't insert them into the DOM</strong>:</p> <pre><code>var $base = $('stuff from templates.html'); var $subs = $('stuff from newTemplates.html'); </code></pre> <p>Then add a simple function to look for templates in <code>$subs</code> before <code>$base</code>:</p> <pre><code>function tmpl(id) { var $t = $subs.filter('#' + id); if($t.length) return _.template($t.html()); return _.template($base.filter('#' + id).html()); } </code></pre> <p>Then you could do this:</p> <pre><code>var foo = tmpl('fooTemplate'); var bar = tmpl('barTemplate'); </code></pre> <p>and The Right Thing would happen.</p> <p>Demo: <a href="http://jsfiddle.net/ambiguous/EhhsL/" rel="nofollow">http://jsfiddle.net/ambiguous/EhhsL/</a></p> <p>This approach also makes it easy to cache the compiled templates and not only avoid double lookups but avoid compiling the same thing over and over again:</p> <pre><code>function tmpl(id) { if(tmpl.cache.hasOwnProperty(id)) return tmpl.cache[id]; var $t = $subs.filter('#' + id); if($t.length) return tmpl.cache[id] = _.template($t.html()); return tmpl.cache[id] = _.template($base.filter('#' + id).html()); } tmpl.cache = { }; </code></pre> <p>Demo: <a href="http://jsfiddle.net/ambiguous/YpcJu/" rel="nofollow">http://jsfiddle.net/ambiguous/YpcJu/</a></p>
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    1. POExtend HTML templates?
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    1. COI really love the second solution- how much of a performance penalty do you think that would cause though?
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    2. CO@stinkycheeseman: The performance hit probably wouldn't be noticeable but you could slip a little bit of caching in (as in my update) pretty easily.
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