How to return the response from an ajax call?
The A in AJAX stands for asynchronous. That means sending the request (or rather receiving the response) is taken out of the normal execution flow. In your example, . send returns immediately and the next statement, return result; , is executed before the function you passed as success callback was even called.
How to get return value from ajax call in javascript?
var b = false; $. ajax({ async: true, contentType: ‘application/json; charset=utf-8’, type: “POST”, dataType: ‘json’, data: JSON. stringify(arrays), url: “MyHandler. ashx”, success: function (result) { b = true; }, error: function () { alert(‘Error occurred’); } });
What is success in Ajax call?
success. A callback function to be executed when Ajax request succeeds. timeout. A number value in milliseconds for the request timeout. type.
How do I wait for AJAX response?
use async:false attribute along with url and data. this will help to execute ajax call immediately and u can fetch and use data from server.
How does AJAX call work?
How AJAX Calls Work. AJAX uses both a browser built-in XMLHttpRequest object to get data from the web server and JavaScript and HTML DOM to display that content to the user. Despite the name “AJAX” these calls can also transport data as plain text or JSON instead of XML.
Can you call Ajax with a return value?
Since AJAX is asynchronous, you can’t, because your AJAX call will not return immediately. What you can do instead, what people usually do, is take a callback function and then call that with the return value. For example:
Can a synchronous Ajax call return a callback function?
Keep in mind that a synchronous call is a blocking call while the request is active. Since AJAX is asynchronous, you can’t, because your AJAX call will not return immediately. What you can do instead, what people usually do, is take a callback function and then call that with the return value.
How to unhide a form in an AJAX callback?
Most forms nowadays overcome the problem of some users double-clicking buttons by doing a setAttribute (‘disabled’, ‘disabled’) on the submit button. You may want to do a double-whammy of hiding the form completely, and putting a button in its place to unhide the form.
Which is better to return data from Ajax success function?
UPDATE: as pointed out in the comments, you might be better using a http get request rather then a post. they both have advantages however get requests can be cached, so for retrieving data it might give a perf boost. Thanks for contributing an answer to Stack Overflow!