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POHow should I load/unload JS called by dynamically loaded partial pages?
 

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  1. POHow should I load/unload JS called by dynamically loaded partial pages?
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    <p>I make use of <em>jQuery</em> and <em>history.js</em> to manage dynamic transitions between partial-pages; such that I avoid reloading entire documents. Some of these partial-pages call their own unique <em>javascript</em> files. While the transitions between pages work well, remnants of executed <em>javascript</em> remain active after the partial page that called it has been dynamically replaced.</p> <p><strong>How can I unload <em>javascript</em> that was introduced with a dynamic page load, and later asynchronously replaced by another page?</strong></p> <p><br></p> <h1><em>The finer details</em></h1> <h2>Master template</h2> <p>My <strong>master template</strong> (used for all pages) can be thought of as a simple:</p> <pre><code>&lt;html&gt; &lt;head&gt; &lt;script&gt; //scripts to manage asynchronous loading of partial-pages into #content div &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;div id="content"&gt;&lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <h2>User profile</h2> <p>One partial page that renders inside the <strong>#content</strong> div is for a user's <strong>Profile</strong>:</p> <pre><code>&lt;script src="profile.js"&gt;&lt;/script&gt; &lt;form&gt; &lt;input type="file" name="profile-picture"&gt; &lt;/form&gt; </code></pre> <p>The contents of <strong>profile.js</strong> are similar to:</p> <pre><code>$(function() { $('input').change(function() { // upload profile picture asynchronously }); }); </code></pre> <h2>User settings</h2> <p>Another partial page that is loaded inside the <strong>#content</strong> div of the <strong>master template</strong> is the user's <strong>Settings</strong>:</p> <pre><code>&lt;script src="settings.js"&gt;&lt;/script&gt; &lt;form&gt; &lt;input type="text" name="first-name"&gt; &lt;input type="text" name="last-name"&gt; &lt;/form&gt; </code></pre> <p>The contents of <strong>settings.js</strong> are similar to:</p> <pre><code>$(function() { setInterval(function() { // auto-submit form every 10 seconds $('form').submit(); }, 10000); } }); </code></pre> <h2>The problems</h2> <ul> <li>Certain <em>javascript</em> functions continue to run (e.g. <strong>setInterval</strong>) after the partial page that called them has been replaced by another.</li> <li>This business of loading new <em>javascript</em> for each partial page feels messy; but for the life of me, I can't find any recommendations for best practices.</li> </ul> <p><strong>What is the better way to achieve this effect of dynamic partial-page loading/unloading while allowing page-specific scripts for each partial page?</strong></p> <p>Thank you!</p>
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    1. CODefinitely clear your intervals as the answers below have suggested. I guess what you're looking for is some secret way of unloading javascript from memory. There isn't one that I'm aware of. Create "class instantiations" per page then set their references to null when you're done. This should allow garbage collection to remove them from memory. This is similar to what @charlie suggested near the end of his answer.
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    2. CO@JaredGotte Cool idea! Something like _var Settings = (function() ..._ Then null *Settings* when loading in a new page?
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    3. COI'm not 100% sure if that syntax instantiates anything. I'm still learning JavaScript. I had in mind something like `var Settings = new ClassName(...` then keeping track where you use Settings. When you're done, set all of the references you have of Settings to null. I guess `Settings = null` would even work.
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