JavaScript - document.write(String contect) writes nothing on html page

浏览数：30 / 时间：2015年06月09日

The following html will output nothing on html page, you may meet it before.

<html>
<head>
    <title>Tmp HTML</title>
    <script type="text/javascript">
        document.write(String.fromCharCode(0x204A));
    </script>
</head>
<body>
</body>
</html>

Why nothing displayed? It is because bothdocument.write anddocument.writeln method output text into anunready (open) document. That is to say, When the page finishes loading, the document becomesclosed. An attempt todocument.write in it will cause the contents to be erased.

You can work around as following:

<html>
<head>
    <title>Tmp HTML</title>
    <script type="text/javascript">
        function MyDocumentWrite() {
            document.write(String.fromCharCode(0x204A));
        }
        window.onload = MyDocumentWrite;
    </script>
</head>
<body>
</body>
</html>

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JavaScript - document.write(String contect) writes nothing on html page