22 lines
536 B
Markdown
22 lines
536 B
Markdown
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---
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title: How Jsonp Is Different from JSON
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localeTitle: Jsonp与JSON的区别
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---
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JSONP只是JSON包装在一个回调函数中。
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JSONP对于发出跨域请求很有用，出于安全原因，这些请求通常被浏览器禁止。
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```
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// an example of JSON
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{"weapon":"nunchucks","headband":"yellow"}
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// an example of JSONP
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myCallback({"weapon":"nunchucks","headband":"yellow"});
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```
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然后，要访问存储在JSONP中的数据，请定义回调函数：
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```
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myCallback = function(data){
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alert(data.weapon);
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};
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```
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