Question

以下代码有效：

<base href="http://www.w3schools.com/" target="_blank">

但这不起作用：

<script>document.write('<base href="' + document.location + '" />');</script>

<script type="text/javascript">    
document.write("<base href='http://" + document.location.host + "' />");    
</script>    

<script type="text/javascript">    
document.write("<base href="http://www.w3schools.com/" target="_blank">");    
</script>

在http://www.customtemplates.com.au/

上

Answer 1

只是逃避你的报价：

document.write("<base href=\"http://www.w3schools.com/\" target=\"_blank\">");

使用简单的引号更简单：

document.write('<base href="http://www.w3schools.com/" target="_blank">');

Answer 2

你正在嵌套双引号。尝试切换到单引号。

<script type="text/javascript">    
document.write('<base href="http://www.w3schools.com/" target="_blank">');    
</script>

Answer 3

请不要使用document.write。请改用createElement。

var head = document.getElementsByTagName('head')[0]; //get the head-Element

var script = document.createElement('script'); //Create a script-element
script.setAttribute('type', 'text/javascript'); //Set an attribute

var base = document.createElement('base'); //Create a base-element
base.setAttribute('href', document.location); //Set an attribute

script.appendChild(base); //Append the base-element to the script-element
head.appendChild(script);  //Append the script-element to the head-element

javascript document.write（＆＃34; <base href =“”/>＆＃34;）;不工作

3 个答案: