是否可以使用JavaScript来更改页面的元标记? [英] Is it possible to use JavaScript to change the meta-tags of the page?
问题描述
如果我在头部放一个div并显示:none,而不是使用JavaScript来显示它,这会有效吗?
If I put a div in the head and display:none, than use JavaScript to display it, will this work?
编辑:
我在AJAX中加载了东西。当我的AJAX更改网站的主要部分时,我也想更改元标记。
I have stuff loaded in AJAX. And as my AJAX changes the "main" portion of the site, I want to change the meta-tags as well.
推荐答案
是的,你可以这样做。
有一些有趣的用例:一些浏览器和插件解析元元素并改变它们对不同值的行为。
There are some interesting use cases: Some browsers and plugins parse meta elements and change their behavior for different values.
<meta name="SKYPE_TOOLBAR" content="SKYPE_TOOLBAR_PARSER_COMPATIBLE">
iPhone:关闭电话号码解析器
iPhone: Switch off phone number parser
<meta name="format-detection" content="telephone=no">
Google Chrome浏览器内嵌框架
Google Chrome Frame
<meta http-equiv="X-UA-Compatible" content="chrome=1">
移动设备的视口定义
Viewport definition for mobile devices
<meta name="viewport" content="width=device-width, initial-scale=1.0">
这个可以通过JavaScript更改。请参阅:修复iPhone视口缩放错误
This one can be changed by JavaScript. See: A fix for iPhone viewport scale bug
某些用户代理(例如Opera)使用书签描述。您可以在此处添加个性化内容。示例:
Some user agents (Opera for example) use the description for bookmarks. You can add personalized content here. Example:
<!DOCTYPE html>
<title>Test</title>
<meta name="description" content="this is old">
<script type='text/javascript' src='http://code.jquery.com/jquery-1.8.2.js'></script>
<button>Change description</button>
<script type='text/javascript'>
$('button').on('click', function() {
// Just replacing the value of the 'content' attribute will not work.
$('meta[name=description]').remove();
$('head').append( '<meta name="description" content="this is new">' );
});
</script>
所以,它不只是关于搜索引擎。
So, it’s not just about search engines.
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