Javascript jquery $. Post $. Ajax usage

Jquery. Post (URL, [data], [callback], [type]): Use the POST method for asynchronous requests.

Parameters:

URL (string): the URL of the request.

Data (MAP): (optional) data to be sent to the server, expressed in key/value pairs.

Callback (function): (optional) callback function when the load is successful (this method is called only when the response returns success ).

Type (string): (optional) the official description is: type of data to be sent. In fact, it should be the client request type (JSON, XML, and so on)

This is a simple POST Request function to replace complex $. Ajax. You can call the callback function when the request is successful. To execute a function when an error occurs, use $. Ajax. ExampleCode:

Ajax. aspx:

Response. contenttype = "application/JSON"; response. Write ("{result: '" + request ["name"] + ", hello! (This message comes from the server) '} "); jquery code:
$. Post ("Ajax. aspx ", {Action:" Post ", name:" Lulu "}, function (data, textstatus) {// data can be xmldoc, jsonobj, HTML, text, and so on. // This; // configure the options for this Ajax request. For more information, see jquery. this alert (data. result) ;}, "JSON"); click submit:

The request format is set to "JSON ":

$. Ajax () is the underlying Ajax Implementation of jquery. For easy-to-use high-level implementation, see $. Get, $. Post, and so on.

There are several Ajax event parameters: beforesend, success, complete, and error. We can define these events to process every Ajax request.

$. Ajax ({URL: 'stat. php ',

Type: 'post ',

Data: {name: "keyun "},

Datatype: 'html ',

Timeout: 1000,

Error: function () {alert ('error loading PHP document ');},

Success: function (result) {alert (result );}

});