javascript变量加双引号的问题

问题在代码的注释里：

<!DOCTYPE html>
<html>
<head>
    <title>Dynamic Script Example 2</title>
</head>
<body>
    <p>You should see an alert saying &quot;hi&quot; after clicking the button.</p>
    <input type="button" value="Add Script" onclick="addScript()">

    <script type="text/javascript">
    
        function loadScriptString(){
            var script = document.createElement("script");
            var code="function sayHi(){alert('hi');}";
            script.type = "text/javascript";
            try {
                script.appendChild(document.createTextNode(code));
            } catch (ex){
                script.text = "code";//就是这一行里的"code"，
                //这里为什么不是字面上的code，
                //而是function sayHi(){alert('hi');}？
                //感觉反直觉。
                //试了下script.text = code;也是可以的。
            }
            document.body.appendChild(script);
        }
    
        function addScript(){
            loadScriptString();
            sayHi();
        }

    </script>
</body>
</html>

javascript

阅读 7.9k

5 个回答

得票最新