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POHow to trigger else clause in an onload event?
 

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  1. POHow to trigger else clause in an onload event?
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    <p>I have the <code>Comments</code> handle in my Google App Engine app to display the comments. I want to stop the page from loading if the user (defined as "chooser" here) is not in <code>localStorage</code>.</p> <p>I get the first 2 alerts: <code>"load event"</code> and <code>chooser: "undefined"</code>. Since "chooser" is undefined I expect the else clause to trigger but I don't get the alert in else clause.</p> <p>Also, the first item in ordered list is displayed but not the rest. So I assume there is an issue with loading of the page. How can I fix this?</p> <pre><code>class Comments(webapp.RequestHandler): def get(self): self.response.out.write(""" &lt;html&gt; &lt;head&gt; &lt;title&gt;Choices&lt;/title&gt; &lt;script type="text/javascript"&gt; function showChoices () { alert("load event"); var chooser = localStorage.getItem("chooser"); alert("chooser: " + chooser); if (chooser) { document.getElementById("topten").style.display="inline"; } else { alert("else triggers"); document.write("get an invitation"); } } window.onload = showChoices; &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;div class="content"&gt;""") #python code: query = Users.all() e = query.fetch(10) self.response.out.write("""&lt;ol&gt;""") for item in e: self.response.out.write(""" &lt;div id="topten" class="title" style="display:none"&gt; &lt;li&gt;%s (&lt;span class="small"&gt;%s&lt;/span&gt;)&lt;/li&gt; &lt;/div&gt; &lt;hr&gt;&lt;br /&gt;""" % tuple([item.choice, item.owner])) self.response.out.write("""&lt;/ol&gt;""") self.response.out.write(""" &lt;/div&gt; &lt;/body&gt; &lt;/html&gt;""") </code></pre>
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