Example Analysis of AJAX parameters in JQuery
This article mainly introduces the example analysis of AJAX parameters in JQuery. The article is very detailed and has certain reference value. Interested friends must read it!
context
Type: Object
This object is used to set the context for Ajax related callback functions. That is, let this in the callback function point to this object (if this parameter is not set, then this points to the options parameter passed when calling this AJAX request). For example, specifying a DOM element as the context parameter sets the context of the success callback function to this DOM element.
It's like this:
$.ajax({ url: "test.html", context: document.body, success: function(){
$(this).addClass("done");
}});
jsonpCallback
Type: String
Specify a callback function name for the jsonp request. This value will be used in place of the random function name automatically generated by jQuery. This is mainly used to make jQuery generate unique function names, which makes it easier to manage requests and also makes it easy to provide callback functions and error handling. You can also specify the callback name when you want browsers to cache GET requests.
xhr
Type: Function
You need to return an XMLHttpRequest object. The default is ActiveXObject in IE and XMLHttpRequest in other cases. Used to override or provide an enhanced XMLHttpRequest object. This parameter was not available before jQuery 1.3.
timeout
Type: Number
Sets the request timeout in milliseconds. This setting overrides the global setting.
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