<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>test</title>
</head>
<body>
<script>
/*为什么第12行会输出[1,2,3,4,5,6],不应该是[1,2,3,4,5,6,7]吗?*/
var arr=[1,2,3,4,5];
arr.push(6,7);
console.log(arr);//输出[1,2,3,4,5,6]
console.log(arr.length);//输出7
arr.pop();
console.log(arr);//输出[1,2,3,4,5,6]
console.log(arr.length);//输出6
</script>
</body>
</html>
