Adding a general parameter to all ajax calls made with jQuery

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I'm using AJAX to load data from the server as needed. I'm currently working on updating the server software to the latest version. One of the things I noticed that has changed is that every request now requires me to pass along a token. This means I have to add a new parameter to every request. I'm hoping to achieve this by a general method, without having to modify every single AJAX call.

Any pointers?

You could use the $.ajaxSetup method as illustrated in the following article.

Add a parameter to all ajax calls with method POST made with jQuery, Answer is simular to Adding a general parameter to all ajax calls made with jQuery, but I need to add additional param only for ajax calls with method post: $. ajax({ url: url, type: "POST", data: data, success: success, dataType: dataType }); Ajax methodology in web development can or cannot have input query parameters for processing/loading web parts on the web page. However, complex logic and improved performance measures demand Ajax call to pass multiple input query parameters whether in a typical multiple parameter format or JSON input format.

What you're looking for is a Prefilter, here's a sample from the page:

$.ajaxPrefilter( function( options, originalOptions, jqXHR ) {
  // Modify options, control originalOptions, store jqXHR, etc

This requires JQuery 1.5.

jQuery.ajaxSetup(), version added: 1.1jQuery. All subsequent Ajax calls using any function will use the new settings, unless For example, the following sets a default for the url parameter before pinging the server repeatedly: 1. 2. 3. $.ajaxSetup({. url: "ping. php". }); Now each time an Ajax request is made, the "ping.php" URL will be used � jQuery AJAX Call with Multiple Parameters If we wanted to make a GET call with more than one parameter, that’s as easy as adding parameters to the method signature. public JsonResult GetPerson(int ID, string name)

An example using ajaxPrefilter to extend posted data :

$.ajaxPrefilter(function( options, originalOptions, jqXHR ) {
    if (originalOptions.type === 'POST' || options.type === 'POST') {
        var modifiedData = $.extend({},,{ property:"val",property_two: "val" }); = modifiedData; = $.param(modifiedData,true);

jQuery.ajax(), version added: 1.5jQuery.ajax( url [, settings ] ) By default, all requests are sent asynchronously (i.e. this is set to true by default). The parameter is not needed for other types of requests, except in IE8 when a POST is made to a URL that has Disables caching by appending a query string parameter, _=[TIMESTAMP]� One of the best features of jQuery AJAX Method is to load data from external website by calling APIs, and get the response in JSON or XML formats. In this example I will show you how easy it is to make such API calls in jQuery AJAX.

Append some parameters in every ajax call's query , I'd like to add parameters like 'mode=ajax' to make server respond as I have many ajax calls to make, and adding these parameters to every It's extremely general and pointless to say: be careful about named functions� Definition and Usage. The ajax() method is used to perform an AJAX (asynchronous HTTP) request. All jQuery AJAX methods use the ajax() method. This method is mostly used for requests where the other methods cannot be used.

.ajaxComplete(), Description: Register a handler to be called when Ajax requests complete. version added: 1.0. Now, make an Ajax request using any jQuery method: If you must differentiate between the requests, use the parameters passed to the handler. DOM Removal � DOM Replacement � General Attributes � Style Properties. Point of clarification: I don't have any problem adding a custom header to my jQuery ajax call, I want to have my custom header added to all ajax calls automatically. If you take a look at jquery $.ajax custom http headers issue (not my question), you'll see a pretty good example of how the code works if implemented by hand for each ajax call.

Using jQuery.ajaxSetup() To Accumulate Global Data Parameters , In jQuery, we have the ability to make one-off AJAX requests with the $.ajax() ajaxSetup() function which allows us to define globally-shared properties for all the AJAX requests made within In general, ajaxSetup() builds the options hash; but when Add another data item to the global confiruguration. This object will be the context of all Ajax-related callbacks. By default, the context is an object that represents the Ajax settings used in the call ($.ajaxSettings merged with the settings passed to $.ajax). For example, specifying a DOM element as the context will make that the context for the complete callback of a request, like so:

  • If you're passing a string vs. object, you will need to use prefilter to append the parameter. We have this: beforeSend: function(jqXHR, settings) { ='&foo=bar'; return true; }
  • Thanks I found this more handy and more generic