How to use Ajax to assign values to global variable exceptions in jquery _jquery

Source: Internet
Author: User

We're using jquery ajax to extract the data from the background after we want to assign it to the global variable, but how can not be assigned, why?

The reason is actually very simple, we use the AJAX is asynchronous operation, that is, in your assignment when the data has not been extracted, you certainly do not, so as long as the change to sync operation on the line ~

Method 1: Set up synchronization to perform AJAX operations first

Copy Code code as follows:

Set Ajax asynchronously to false in the global or a required function, which is synchronous
$.ajaxsetup ({
Async:false
});

And then do your AJAX operations.
$.post (address, parameters, function (data, status) {
if (status = = "Success") {
Assigning values to global variables
}
else {
Alert ("wrong");
}
});


Method 2: Direct use of $.ajax
Copy Code code as follows:

$.ajax ({
Type: "Post",
URL: Address,
Data: "parameter" + the value of the parameter,
Async:false,
Success:function (data) {
Assigning values to global variables;
}
});

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