什么是JSON.stringify()并解释其在javascript中的用法？
JSON.stringify()
如果需要将数据发送到Web服务器，则数据应为字符串。要将对象文字更改为字符串，应使用JSON.stringify()方法。
示例1
<html>
<body>
<p id="demo"></p>
<script>
var obj = {name:"rekha", age:40, city:"newyork"};
var myJSON = JSON.stringify(obj);
document.getElementById("demo").innerHTML = myJSON;
</script>
</body>
</html>输出结果
{"name":"rekha","age":40,"city":"newyork"}示例2
<html>
<body>
<p id="demo"></p>
<script>
var obj = {"name":"ramesh","age":30,"family":
[{"mother":"geetha","father":"rao"}],"city":"berlin"};
var myJSON = JSON.stringify(obj);
document.getElementById("demo").innerHTML = myJSON;
</script>
</body>
</html>输出结果
{"name":"ramesh","age":30,"family":[{"mother":"geetha","father":"rao"}],"city":"berlin"}