[js]jquery里的jsonp实现ajax异源请求

同源请求-jquery

<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script><script type="text/javascript">$.ajax({url: "data.txt",type: "get",dataType: "json",success: function (data) {console.log(data);}});
</script>

data.txt

{"name": "maotai", "age":22}

jsonp异源请求-jquery

• 函数名是随机字符串

<script type="text/javascript" src="js/jquery-1.11.3.js"></script>
<script type="text/javascript">// jsonp默认是get, jsonp默认使用callback 并且随机生成字符串作为函数名$.ajax({url: "https://suggest.taobao.com/sug?code=utf-8&q=%E5%9B%B4%E5%B7%BE",dataType: "jsonp",success: function (data) {console.log(data);}});
</script>

• 指定函数名

<script type="text/javascript" src="js/jquery-1.11.3.js"></script>
<script type="text/javascript">// jsonp默认是get, jsonp默认使用callback 并且随机生成字符串作为函数名$.ajax({url: "https://suggest.taobao.com/sug?code=utf-8&q=%E5%9B%B4%E5%B7%BE",dataType: "jsonp",jsonpCallback: "fn",jsonp: "cb",success: function (data) {console.log(data);}});
</script>