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moriiimo/gist:5428825

Created April 21, 2013 07:59
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呼び出し元の引数を別の関数内で書き換えることができる。（IE限定）
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gistfile1.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="ja">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="Content-Style-Type" content="text/css">
<meta http-equiv="Content-Script-Type" content="text/javascript">
<title>IEだけでできること：呼び出し元の引数を壊す</title>
<script type="text/javascript" src="../js/lib/jquery-1.9.1.min.js"></script>
<link rel="stylesheet" type="text/css" href="../css/style.css"/>
</head>
<body>
<script>
$(function () {
function func1(bool) {
func2();
console.log(bool); // false と出力したい。
}
function func2() {
func2.caller.arguments[0] = false; // ここでfunc1の仮引数boolの値をfalseにできる。IEだけfalseになる。
// https://developer.mozilla.org/ja/docs/JavaScript/Reference/Global_Objects/Function/caller
}
func1(true);
});
</script>
<div>
</div>
</body>
</html>
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