$.when (). Then ()

Executes a function when two AJAX requests are successful myFuncIf any of the errors are executed myFailure。

$.when($.ajax("/page1.php"), $.ajax("/page2.php"))
 .then(myFunc, myFailure);

Jquery.when (deferreds)

Parameter deferreds, one or more delay objects or JS objects, we initially think of it as one or more asynchronous requests.

For example:

[JavaScript]View Plaincopyprint?

1. $.when ($.ajax ("page1.php"), $.ajax ("page2.php"))

$.when ($.ajax ("page1.php"), $.ajax ("page2.php"))

the When () function is often used in conjunction with the Done () function, fail () function, then () function: Done (Function func)-Execute function callback when processing in Deferreds is complete fail (Function func)-Whena function callback is executed when there is a processing failure in the Deferredsthen (function func1,function func2)-combines the done and fail functions, when both execute func1 successfully, when there is a failure to execute FUNC2

Example:

[JavaScript]View Plaincopyprint?

2. var  Whenresult = $.when ($.ajax ("page1.php"), $.ajax ("page2.php"));
4. Whenresult.done (function(A1,A2) {
6. //function content slightly   
8. //A1 and A2 parameters are related JQXHR objects of two AJAX requests in the When function   
10. });
12. Whenresult.fail (function() {
14. //function content slightly   
16. })
18. Whenresult.then (Successfunc,failurefunc);

var whenresult = $.when ($.ajax ("page1.php"), $.ajax ("page2.php")), Whenresult.done (function (A1,A2) {//function content slightly// The A1 and A2 parameters are the related JQXHR objects of two AJAX requests in the When function}), Whenresult.fail (function () {//function contents}) Whenresult.then (Successfunc, FAILUREFUNC);

$.when (). Then ()