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		<h1>Open Power Template 2.0</h1>
		<h2>opt:on</h2>
		<p class="generated">@ 02.09.2010</p>
		<p class="location"><a href="index.html"><strong>User manual</strong></a> &raquo; <a href="syntax.html">Template syntax</a> &raquo; <a href="syntax.attributes.html">OPT attributes</a> &raquo; <a href="syntax.attributes.on.html">opt:on</a></p>
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	<div id="content"><dl class="location"><dt><a href="syntax.attributes.html">3.8. OPT attributes</a><br/>3.8.7. opt:on</dt><dd class="prev">3.8.6. opt:if<br/><a href="syntax.attributes.if.html">&laquo; Previous</a></dd><dd class="next">3.8.8. opt:section<br/><a href="syntax.attributes.section.html">Next &raquo;</a></dd></dl>	<h1>3.8.7. opt:on</h1><p>The attribute allows to display a tag conditionally, but with keeping the content.</p>

<pre class="xml"><span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;p<span style="color: #000000; font-weight: bold;">&gt;</span></span><span style="color: #000000; font-weight: bold;">&lt;a</span> <span style="color: #000066;">parse:href</span>=<span style="color: #ff0000;">&quot;$user.www&quot;</span> <span style="color: #000066;">opt:on</span>=<span style="color: #ff0000;">&quot;isAddress($user.www)&quot;</span><span style="color: #000000; font-weight: bold;">&gt;</span></span>{$user.nick}<span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;/a<span style="color: #000000; font-weight: bold;">&gt;</span></span><span style="color: #000000; font-weight: bold;">&lt;/p<span style="color: #000000; font-weight: bold;">&gt;</span></span></span></pre>

<p>If the <code>$user.www</code> is a valid URL, we will see:</p>

<pre class="xml"><span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;p<span style="color: #000000; font-weight: bold;">&gt;</span></span><span style="color: #000000; font-weight: bold;">&lt;a</span> <span style="color: #000066;">href</span>=<span style="color: #ff0000;">&quot;http://www.example.com/&quot;</span><span style="color: #000000; font-weight: bold;">&gt;</span></span>Nickname<span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;/a<span style="color: #000000; font-weight: bold;">&gt;</span></span><span style="color: #000000; font-weight: bold;">&lt;/p<span style="color: #000000; font-weight: bold;">&gt;</span></span></span></pre>

<p>And if not:</p>

<pre class="xml"><span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;p<span style="color: #000000; font-weight: bold;">&gt;</span></span></span>Nickname<span style="color: #009900;"><span style="color: #000000; font-weight: bold;">&lt;/p<span style="color: #000000; font-weight: bold;">&gt;</span></span></span></pre>

<p>Note that such code has no effect when using with instruction tags.</p>
<h4>See also:</h4><ul><li><a href="syntax.instructions.if.html">3.7.11. opt:if</a></li></ul><dl class="location location-bottom"><dt>3.8.7. opt:on<br/><a href="syntax.attributes.html">3.8. OPT attributes</a></dt><dd class="prev"><a href="syntax.attributes.if.html">&laquo; Previous</a><br/>3.8.6. opt:if</dd><dd class="next"><a href="syntax.attributes.section.html">Next &raquo;</a><br/>3.8.8. opt:section</dd></dl>		</div>
	
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