jquery-callback | 易学教程

jQuery HOW TO?? pass additional parameters to success callback for $.ajax call?

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问题 I am trying, in vain it seems, to be able to pass additional parameters back to the success callback method that I have created for a successful ajax call. A little background. I have a page with a number of dynamically created textbox / selectbox pairs. Each pair having a dynamically assigned unique name such as name="unique-pair-1_txt-url" and name="unique-pair-1_selectBox" then the second pair has the same but the prefix is different. In an effort to reuse code, I have crafted the callback

closure inside a for loop - callback with loop variable as parameter [duplicate]

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This question already has an answer here: JavaScript closure inside loops – simple practical example 43 answers I am using jQuery "GET" in a loop to obtain several results from the server. I want to include the loop index as a fixed parameter to the call back but its not working. (I followed the advice of this article on how to do it.) However, the value I get in the call back is completely not what I expect – rather than each loop index value, it is always equal to the exit value of the index. ie. the code fragment here prints out '16' for each execution of the callback. How do I get it to

jquery ajax ignores 500 status error

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问题 I'm making some GET requests to an App Engine app, testing in Chrome. Whilst I can see in javascript console that some calls result in a 500 server error, I can't seem to find anyway of capturing this error in my jQuery code despite reading a number of similar SO threads. I understand that it indicates a server side error, but I'd still like to be able to capture such an error from my javascript. I need to capture the error so that I can count the number of responses (successful or otherwise)

Proper way to add a callback to jQuery DatePicker

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问题 DatePicker has an internal function, _adjustDate() , which I'd like to add a callback after. Current Method This is how I'm currently doing this. Basically, just replacing the function defintion with itself, plus the new operations. This effects all datepickers, which I'm not sure is desired, either. $(function(){ var old = $.datepicker._adjustdate; $.datepicker._adjustDate = function(){ old.apply(this, arguments); // custom callback here console.log('callback'); }; }); _adjustDate is what's

How do I animate in jQuery without stacking callbacks?

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问题 Let's say I have three divs, and I'd like each to animate once the previous one is done. Currently, I write this: $('div1').fadeOut('slow', function() { $('div2').fadeOut('slow', function() { $('div3').fadeOut('slow'); }); }); Which is ugly, but manageable. Now imagine I have 10 different animations that need to happen one after the other on different elements . Suddenly the code gets so clunky that it's extremely hard to manage... Here's pseudocode for what I'm looking to do: $('div1')

jQuery $.animate() multiple elements but only fire callback once

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If you select a class or collection of elements to animate with jQuery: $('.myElems').animate({....}); And then also use the callback function, you end up with a lot of unneccessary animate() calls. var i=1; $('.myElems').animate({width:'200px'}, 200, function(){ //do something else $('#someOtherElem').animate({opacity:'1'}, 300, function(){ if (i>1) console.log('the '+i+'-th waste of resources just finished wasting your resources'); i++; }); }); Arguably this is just bad code and / or design - but is there something I can do that both avoids having many animate() calls with only one of them

jQuery $.animate() multiple elements but only fire callback once

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问题 If you select a class or collection of elements to animate with jQuery: $(\'.myElems\').animate({....}); And then also use the callback function, you end up with a lot of unneccessary animate() calls. var i=1; $(\'.myElems\').animate({width:\'200px\'}, 200, function(){ //do something else $(\'#someOtherElem\').animate({opacity:\'1\'}, 300, function(){ if (i>1) console.log(\'the \'+i+\'-th waste of resources just finished wasting your resources\'); i++; }); }); Arguably this is just bad code

Bypass popup blocker on window.open when JQuery event.preventDefault() is set

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问题 I want to show a JQuery dialog conditionally on click event of an hyperlink . I have a requirement like on condition1 open a JQuery dialogue and if condition1 is not satisfied, navigate to the page as referenced by \'href\' tag of whose click event is in question. I am able to call a function on link\'s click event. This function now checks the said condition by executing another URL (that executes my Spring controller and returns response). All works perfect with only window.open being