Ajax

English [ˈeɪˌdʒæks] American [ˈeˌdʒæks]

n. The full name is "Asynchronous JavaScript and XML" (asynchronous JavaScript and XML); refers to a A web development technology for creating interactive web applications. ; Ajax copper-tin-lead bearing alloy, Yajis explosive

send

UK[send] US[sɛnd]

vt.Send ; dispatch; cause to make (a certain reaction); cause to enter (a certain state)

vt.& vi. Send by radio waves, send out information

vi. Dispatch, send out, send people

adj.[only used as an attributive]

used for sending

ajax ajaxSend() method syntax

Function: ajaxSend() method executes the function when the AJAX request starts. It is an Ajax event.

Syntax: .ajaxSend([function(event,xhr,options)])

##Parameters:

ParametersDescriptionfunction(event,xhr,options) Required. Specifies that the function should be executed when the request is started. Additional parameters: event - contains the event object xhr - contains the XMLHttpRequest object options - contains the options used in the AJAX request.

Description: The XMLHttpRequest object and settings are passed as parameters to the callback function.

ajax ajaxSend() method example

<html>
<head>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
  $("div").ajaxSend(function(e,xhr,opt){
    $(this).html("正在请求：" + opt.url);
  });
  $("button").click(function(){
    $("h2").text("文本已经改变");
        alert("请求成功");
  });
});
</script>
</head>
<body>
<div id="txt"><h2>通过 AJAX 改变文本</h2></div>
<button>改变内容</button>
</body>
</html>
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