blocks|key|1624730|text|文档在这里：http://docs.jquery.com/Ajax/jQuery.ajax|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1624731|但是，总而言之，ajax调用需要一堆选项。你要找的是错误和成功。|1624732|你可以这样称呼它：|1624733|$.ajax({
++url:+'mypage.html',
++success:+function(){
++++alert('success');
++},
++error:+function(){
++++alert('failure');
++}
});|code-block|syntax|javascript|1624734|我已经展示了不带参数的success和error函数，但它们可以接收参数。|1624735|error函数可以接受三个参数:+XMLHttpRequest、textStatus和errorThrown。|1624736|success函数可以接受两个参数:+data和textStatus。您请求的页面将位于数据参数中。|1624737|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.jquery.com/Ajax/jQuery.ajax^0|6|13|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|D|3|E|5|6|7|14|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|15|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|16|8|@]|9|@]|C|$K|L]]|$1|M|3|N|5|6|7|17|8|@]|9|@]|C|$]]|$1|O|3|P|5|6|7|18|8|@]|9|@]|C|$]]|$1|Q|3|R|5|6|7|19|8|@]|9|@]|C|$]]|$1|S|3|-4|5|6|7|1A|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]]]

The documentation is here: <a href="http://docs.jquery.com/Ajax/jQuery.ajax" rel="noreferrer">http://docs.jquery.com/Ajax/jQuery.ajax</a>

But, to summarize, the ajax call takes a bunch of options. the ones you are looking for are error and success.

You would call it like this:

<pre><code>$.ajax({
 url: 'mypage.html',
 success: function(){
 alert('success');
 },
 error: function(){
 alert('failure');
 }
});
</code></pre>

I have shown the success and error function taking no arguments, but they can receive arguments.

The error function can take three arguments: XMLHttpRequest, textStatus, and errorThrown.

The success function can take two arguments: data and textStatus. The page you requested will be in the data argument.

blocks|key|1624785|text|如果需要失败函数，则不能使用$.get或$.post函数；需要直接调用$.ajax函数。您可以传递一个options对象，该对象可以有“成功”和“错误”回调。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1624786|而不是这样：|1624787|$.post("/post/url.php",+parameters,+successFunction);|code-block|syntax|javascript|1624788|您将使用以下代码：|1624789|$.ajax({
++++url:+"/post/url.php",
++++type:+"POST",
++++data:+parameters,
++++success:+successFunction,
++++error:+errorFunction
});|1624790|还有很多其他的选择可用。The+documentation列出了所有可用的选项。|offset|length|1624791|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.jquery.com/Ajax/jQuery.ajax#options^0|0|0|0|0|0|C|H|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|13|8|@]|9|@$O|14|P|15|1|16]]|A|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

If you need a failure function, you can't use the $.get or $.post functions; you will need to call the $.ajax function directly. You pass an options object that can have "success" and "error" callbacks.

Instead of this:

<pre><code>$.post("/post/url.php", parameters, successFunction);
</code></pre>

you would use this:

<pre><code>$.ajax({
 url: "/post/url.php",
 type: "POST",
 data: parameters,
 success: successFunction,
 error: errorFunction
});
</code></pre>

There are lots of other options available too. <a href="http://docs.jquery.com/Ajax/jQuery.ajax#options" rel="noreferrer">The documentation</a> lists all the options available.

blocks|key|1624868|text|我想知道，为什么他们没有在jquery本身中提供，所以我在jquery文件中做了一些更改，，，这是更改后的代码块：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1624869|原始代码块：|1624870|++++post:+function(+url,+data,+callback,+type+)+{
++++//+shift+arguments+if+data+argument+was+omited
++++if+(+jQuery.isFunction(+data+)+)+{
++++++++type+=+type+%7C%7C+callback;
++++++++callback+=+data;
++++++++data+=+{};
++++}

++++return+jQuery.ajax({
++++++++type:+"POST",
++++++++url:+url,
++++++++data:+data,
++++++++success:+callback,
++++++++dataType:+type
++++});++|code-block|syntax|javascript|1624871|更改的代码块：|1624872|++++++++post:+function+(url,+data,+callback,+failcallback,+type)+{
++++++++if+(type+===+undefined+%7C%7C+type+===+null)+{
++++++++++++if+(!jQuery.isFunction(failcallback))+{+
++++++++++++type=failcallback
++++++++}
++++++++else+if+(!jQuery.isFunction(callback))+{
++++++++++++type+=+callback
++++++++}
++++++++}
++++++++if+(jQuery.isFunction(data)+&&+jQuery.isFunction(callback))+{
++++++++++++failcallback+=+callback;

++++++++}
++++++++//+shift+arguments+if+data+argument+was+omited
++++++++if+(jQuery.isFunction(data))+{
++++++++++++type+=+type+%7C%7C+callback;
++++++++++++callback+=+data;
++++++++++++data+=+{};

++++++++}


++++++++return+jQuery.ajax({
++++++++++++type:+"POST",
++++++++++++url:+url,
++++++++++++data:+data,
++++++++++++success:+callback,
++++++++++++error:failcallback,
++++++++++++dataType:+type
++++++++});
++++},|1624873|这应该对那些试图在jquery中捕获$.Post错误的人有所帮助。|1624874|更新:或者有另一种方法可以做到这一点：|1624875|+++$.post(url,{},function(res){
++++++++//To+do+write+if+call+is+successful
+++}).error(function(p1,p2,p3){
+++++++++++++//To+do+Write+if+call+is+failed
++++++++++});|1624876|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|F|7|11|8|@]|9|@]|A|$G|H]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

I was wondering, why they didnt provide in jquery itself, so i made a few changes in jquery file ,,, here are the changed code block:

original Code block:

<pre><code> post: function( url, data, callback, type ) {
 // shift arguments if data argument was omited
 if ( jQuery.isFunction( data ) ) {
 type = type || callback;
 callback = data;
 data = {};
 }

 return jQuery.ajax({
 type: "POST",
 url: url,
 data: data,
 success: callback,
 dataType: type
 }); 
</code></pre>

Changed Code block:

<pre><code> post: function (url, data, callback, failcallback, type) {
 if (type === undefined || type === null) {
 if (!jQuery.isFunction(failcallback)) { 
 type=failcallback
 }
 else if (!jQuery.isFunction(callback)) {
 type = callback
 }
 }
 if (jQuery.isFunction(data) &amp;&amp; jQuery.isFunction(callback)) {
 failcallback = callback;

 }
 // shift arguments if data argument was omited
 if (jQuery.isFunction(data)) {
 type = type || callback;
 callback = data;
 data = {};

 }


 return jQuery.ajax({
 type: "POST",
 url: url,
 data: data,
 success: callback,
 error:failcallback,
 dataType: type
 });
 },
</code></pre>

This should help the one trying to catch error on $.Post in jquery.

Updated:
Or there is another way to do this is :

<pre><code> $.post(url,{},function(res){
 //To do write if call is successful
 }).error(function(p1,p2,p3){
 //To do Write if call is failed
 });
</code></pre>

blocks|key|1410195|text|使用jQuery+1.8及更高版本时，应使用以下内容：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1410196|var+request+=+$.ajax({
++++type:+'POST',
++++url:+'mmm.php',
++++data:+{+abc:+"abcdefghijklmnopqrstuvwxyz"+}+})
++++.done(function(data)+{+alert("success"%2Bdata.slice(0,+100));+})
++++.fail(function()+{+alert("error");+})
++++.always(function()+{+alert("complete");+});|code-block|syntax|javascript|1410197|查看文档，如@hitautodestruct所述。|1410198|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

using jQuery 1.8 and above, should use the following:

<pre><code>var request = $.ajax({
 type: 'POST',
 url: 'mmm.php',
 data: { abc: "abcdefghijklmnopqrstuvwxyz" } })
 .done(function(data) { alert("success"+data.slice(0, 100)); })
 .fail(function() { alert("error"); })
 .always(function() { alert("complete"); });
</code></pre>

check out the docs as @hitautodestruct stated.

blocks|key|1410226|text|这种风格也是可能的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1410227|$.get("mypage.html")
++++.done(function(result){
++++++++alert("done.+read+"%2Bresult.length%2B"+characters.");
++++})
++++.fail(function(jqXHR,+textStatus,+errorThrown){
++++++++alert("fail.+status:+"%2BtextStatus);
++++})|code-block|syntax|javascript|1410228|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This style is also possible:

<pre><code>$.get("mypage.html")
 .done(function(result){
 alert("done. read "+result.length+" characters.");
 })
 .fail(function(jqXHR, textStatus, errorThrown){
 alert("fail. status: "+textStatus);
 })
</code></pre>

how do i define the success and failure function of an ajax $.post?

Jquery checking success of ajax post

jQuery

如何定义ajax $.post的成功和失败函数？

问Jquery检查ajax post是否成功
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