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PORewriting setInterval function using Underscore debounce
 

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  1. PORewriting setInterval function using Underscore debounce
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    <p>I'm rewriting my setInterval task so that I no longer have to clearInterval when I jump to a different tab on my site using Underscore.js debounce.</p> <p>I keep getting the error <code>_.debounce is not a function</code>.</p> <p>This is my original working code below. Basically, when the tab is 'pano', I run this function that changes the camera angle every 50ms. When I reclick on the 'pano' tab, clearInterval resets the timer.</p> <pre><code>clearInterval(timerID); if (target == 'pano') { initialize(); timerID = setInterval(function(){ if (!hovering &amp;&amp; !moved) { panoOptions.pov.heading += .5; panoOptions.pov.heading = wrapAngle(panoOptions.pov.heading); panorama.setOptions(panoOptions); } },50); initialize(); } </code></pre> <p>When I try to refactor my code to use <code>._debounce</code> (http://underscorejs.org/#debounce), I get an error and am not if my approach is correct.</p> <pre><code>timerID = _.debounce(function(){ if (!hovering &amp;&amp; !moved) { panoOptions.pov.heading += .5; panoOptions.pov.heading = wrapAngle(panoOptions.pov.heading); panorama.setOptions(panoOptions); } },50); $("#pano_toggle").click( function(){ console.log("CLICKED"); timerID(); } ); </code></pre> <p>I basically set up a click listener so that when the user clicks on the button, the debounce function starts running. I also added <code>console.log("CLICKED")</code> to see if my click listener is working, but it isn't picking up the click.</p> <p>Any tip on where my logic is failing?</p> <p>Edit:</p> <p>I made sure to require Underscore.js:</p> <pre><code>require(["require", "jquery", "underscore", "lib/jquery/jquery.galleria", "gmaps!", "//assets.pinterest.com/js/pinit.js", "twitter_bootstrap/bootstrap-dropdown"], function(require, _){ </code></pre>
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    1. COYour error is `_.debounce is not a function`? You did put a `<script src="path/to/underscore.js"></script>` in your markup right?
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    2. CO@alpha123 Yes, I made sure to include the script. I'll play around with the naming/path to see if that is the issue.
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    3. CO@alpha - unless he defined "_" elsewhere, I believe you'd get a different error than "debounce is not a function", but I could be wrong about that. It would be nice though to have a link to your site where this is failing or a fiddle, I haven't been able to replicate the error.
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