book/10、DOM和BOM/dom/01、document对象/03、open和close.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>菜鸟教程(runoob.com)</title>
    <script>
        function createDoc(){
            let w=window.open();
            w.document.open();
            w.document.write("<h1>Hello World!</h1>");
            w.document.close();
        }
    </script>
</head>
<body>

<input type="button" value="新窗口的新文档" onclick="createDoc()">

</body>
</html>