jquery学习(岳文老师)

$.ajax({
	"url": "",
    "data": {},
    "async": true,
    "cache": true,
    "type": "GET",
    "timeout": "3000",
    "dataType": "jsonp",
    "success": function(d){},
    "error": function(err){},
    "complete": function(d){}
})

$.ajax({
	"url":"",
	"date":{},
	"dataType":"jsonp"
}).done(function(d){}).fail(function(){}).always(function(){})

$.ajax({
    "url": "http://open.onebox.haosou.com/dataApi/getWeatherSheepTalk",
    "data": {
        "addInfo": "1_0|2_0|3_0",
        "src": "onebox"
    },
    "async": true,
    "cache": true,
    "type": "GET",
    "dataType": "jsonp",
    //"timeout": "10"
}).done(function(d){
    console.log("done", d);
}).fail(function(err){
    console.log("fail", err);
}).always(function(){
    console.log("always");
})

fetch("http://open...").then(
function(d){console.log(d);}
,function(err){console.log("error:", err);
})

fetch("/data.json").then(function(res) {
  // res instanceof Response == true.
  if (res.ok) {
    res.json().then(function(data) {
      console.log(data.entries);
    });
  } else {
    console.log("Looks like the response wasn't perfect, got status", res.status);
  }
}, function(e) {
  console.log("Fetch failed!", e);
});

fetch("http://www.example.org/submit.php", {
  method: "POST",
  headers: {
    "Content-Type": "application/x-www-form-urlencoded"
  },
  body: "firstName=Nikhil&favColor=blue&password=easytoguess"
}).then(function(res) {
  if (res.ok) {
    alert("Perfect! Your settings are saved.");
  } else if (res.status == 401) {
    alert("Oops! You are not authorized.");
  }
}, function(e) {
  alert("Error submitting form!");
});

deferred = $.Deferred()
deferred.done(Fun)
deferred.fail(Fun)
deferred.then(Fun,Fun)
deferred.always(Fun)
deferred.resolve()
deferred.reject()
deferred.promise()
$.when(deferred)

var d1 = $.Deferred();
var d2 = $.Deferred();
	$.when( d1, d2 )
		.done(function ( v1, v2 ) {
			console.log( v1 );
			console.log( v2 );
		})
		.fail(function(v2){
			console.log(v2)
		})

var getIP = $.ajax({
	url:’http://api.ip.360.cn’,
	dataType:’jsonp’,
timeout:1000
});

var wait = function(){
	var dtd = $.Deferred(); //在函数内部，新建一个Deferred对象
	var tasks = function(){
		alert("执行完毕！");
　　　　dtd.resolve(); // 改变Deferred对象的执行状态
　　　}; 
　　  setTimeout(tasks,5000);
　　　return dtd.promise(); // 返回promise对象
　};
　$.when(wait())              //为条件判断
　.done(function(){ alert("哈哈，成功了！"); })
　.fail(function(){ alert("出错啦！"); });

$(elem).promise
$("div").each(function(i){
	$(this).fadeIn().fadeOut(1000*(i+1));
});
$("div").promise().done(function(){
	$("p").append("Finished!");
});

<button>Go</button>
<p>Ready...</p>
<div></div>
<div></div>
<div></div>
<div></div>

div {
  height: 50px; width: 50px;
  float: left; margin-right: 10px;
  display: none; background-color: #090;
}

$("button").bind( "click", function() {
  $("p").append( "Started...");
 
  $("div").each(function( i ) {
    $( this ).fadeIn().fadeOut( 1000 * (i+1) );
  });
 
  $( "div" ).promise().done(function() {
    $( "p" ).append( " Finished! " );
  });
});

var effect = function(){
	return $("div").fadeIn(800).delay(1200).fadeOut();
}
$.when( effect() ).done( function(){   // 在effect函数执行完毕后，再执行done中的function
	$("p").append(" Finished! ");
})