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POWait for a recursive jQuery function to completely finish
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  1. POWait for a recursive jQuery function to completely finish
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    copied!<p>Another one that should be simple, but is giving me trouble. I am trying to learn about jQuery's .Deferred() and .promise() functionality to delay certain actions until a recursive function is completely finished. Currently, my code is similar to the following:</p> <pre><code> function showText(setTarget, setMessage, setIndex, setInterval) { var defer = jQuery.Deferred(); var doShowText = function (target, message, index, interval) { if (index &lt; message.length) { $(target).append(message[index++]); setTimeout(function () { doShowText(target, message, index, interval); }, interval); } else { alert("Done!"); defer.resolve(); } }; doShowText(setTarget, setMessage, setIndex, setInterval); return defer.promise(); } function startButtonClick() { displayElement($("#getElement")); showText($("#getElement &gt; h1"), "This text will slowly write to the screen.", 0, 50).promise() .then(alert("Finished.")); } </code></pre> <p>When this runs, "Finished" alert (which I am trying to defer) runs after the first execution of the recursive script, so it will appear when only one letter has been printed (not the intended result). The "Done" alert, however, appears correctly once all of the letters have been printed and the recursion is finished, so it seems as though my defer variable should not be resolved until then. Can anyone help me discover why the "Finished" alert is being called early here? Any assistance is appreciated!</p> <p>EDIT: I realized I had accidentally posted a slightly older version of my code. It has been updated with the correct version (the behavior at run time is the same).</p>
 

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