我不确定如何定义这new member
个东西,请查看下面的演示,我想要的是ListNewMemberNames
:
代码(demo.html)假定在浏览器中运行
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Var1 Test</title>
</head>
<body>
<script>
var1 = {value:7} /* same as window.var1 = {value:7}*/
ListMemberNames(window)
/* returns: ["__defineGetter__", ... "addEventListener", "alert", ... "var1"] */
ListNewMemberNames(window)
/* returns: ["var1"] */
function ListMemberNames(obj){ /* tricks with .hasOwnProperty() or something*/ }
function ListNewMemberNames(obj){ /* ? */ }
</script>
</body>
</html>