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POHow to invoke a "Please Wait" window only if ajax takes more than X milliseconds to respond?
 

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  1. POHow to invoke a "Please Wait" window only if ajax takes more than X milliseconds to respond?
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    <p>I'm doing an AJAX call (regular JS) and, if it takes more than, say, 500 milliseconds, I'd like to put up my "Please Wait" box.</p> <p>Normally, if I want to put up the PW box immediately, I'd do:</p> <pre><code>// show semi-transparent grey screen to block access to everything underneath divGreyCoverAllNode.style.display = 'inline'; // show PW box. Prior to these lines, both coverall and PW were display=none divPleaseWaitNode.style.display = 'inline'; // now do the AJAX and follow-up inside a zero timer; the timer is necessary to // make the system pause to display the screen changes we previously invoked setTimeout( function() { // do my ajax call here, then after the call... // take down the PW stuff divPleaseWaitNode.style.display = 'none'; divGreyCoverAllNode.style.display = 'none'; }, 0 ); </code></pre> <p>Like I stated above, what I'd like to do is have the PW displayed only if AJAX doesn't finish in, say, 500 milliseconds. Ideally it would be something like:</p> <pre><code>// set a timer to display PW in 500 milliseconds myTimeEvent = setTimeout( function() { divGreyCoverAllNode.style.display = 'inline'; divPleaseWaitNode.style.display = 'inline'; }, 500 ); // do my ajax call here, then after the call... clearTimeout(myTimeEvent); // take down the PW stuff, in case it was displayed divPleaseWaitNode.style.display = 'none'; divGreyCoverAllNode.style.display = 'none'; </code></pre> <p>But I can't seem to get the system to pause and display the PW when AJAX is taking its time. I've tried surrounding the AJAX-and-follow-up block in a zero timer, but no deal.</p> <p>Any suggestions?</p> <p>EDIT: Important fact: This is <em>not</em> an asynch ajax call. It's an unusual situation that requires everything to wait on the ajax result.</p>
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    1. CODid you put the `clearTimeout` in the response part of the ajax call? It's not clear in your question
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    2. CO`clearTimeout` comes immediately after I get the result of the AJAX call. It's not part of the `onreadystatechange` function. But this is a rather odd ajax call, in that it is *not* asynch.
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