<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body>
<script>
var str = "abcdea";
//给字符查索引(索引值为0,说明字符串以查询的参数为开头)
console.log(str.indexOf("c"));
console.log(str.lastIndexOf("c"));
console.log(str.indexOf("a"));
console.log(str.lastIndexOf("a"));
//了解；数据传递的时候经常需要通过编码后在传递，接收后还需要反编译回来。
var url = "http://www.itcast.cn?username='aaa'&password='123'";
console.log(encodeURIComponent(url));
console.log(decodeURIComponent(encodeURIComponent(url)));
</script>
</body>
</html>
index
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