问题描述
假设我有以下HTML代码:
Assuming I have this HTML code:
<a href="mailto:[email protected]" target="_blank"></a>
据我所知，出于安全和隐私的原因，最佳实践告诉我必须在每个外部链接上添加rel="noopener noreferrer".我是否必须将mailto链接视为外部链接?
As far as I know, for security and privacy reason, best practices tells I have to add rel="noopener noreferrer" on every link that goes outside. Do I have to consider a mailto link as an external link?
推荐答案
在邮件中，我认为这没有任何区别.引荐来源标头包含源链接位置的URL-但是电子邮件没有 URL，因此在这种情况下，我希望引荐来源标头为空或不存在.
Within a mail message, I think it won't make any difference. Referrer headers include the URL of the location of the source link - but an email message does not have a URL, so I'd expect the referrer header to be empty or absent in that case.
不可能在电子邮件客户端中使用navigator.registerProtocolHandler之类的东西，因为它们通常不支持任何类型的脚本.当您使用网络邮件客户端时，这可能会有所不同，但我尚未对此进行测试.
It's not possible to use things like navigator.registerProtocolHandler in an email client because they typically don't support any kind of scripting. When you're using a webmail client this might behave differently, but I've not tested that.
反之，如果您有一个网页，其中包含已发送到邮件客户端的mailto链接，那么我再也没有见过使用引荐来源网址做任何事情的邮件客户端，因为它不是HTTP客户端并且不处理HTTP请求，而是处理协议切换.
Going the other direction, if you have a web page containing the mailto link that gets sent to a mail client, I've never seen a mail client that does anything with a referrer URL, again, because it's not an HTTP client and is not handling an HTTP request, but a protocol hand-off.
总体设置rel="noopener noreferrer"不会损害您的链接，但是从功能或安全的角度来看，我怀疑它也不会做任何有用或有趣的事情.
Overall setting rel="noopener noreferrer" will not harm your links, but I suspect it won't do anything useful or interesting from a functionality or security point of view either.
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