如何检查用户是否可以返回浏览器历史记录 [英] How to check if the user can go back in browser history or not

问题描述

我想使用JavaScript来查看是否有历史记录，我的意思是如果浏览器上有后退按钮可用。

I want using JavaScript to see if there is history or not, I mean if the back button is available on the browser or not.

推荐答案

简答：你不能。

从技术上讲，有一种准确的方法，就是检查财产：

Technically there is an accurate way, which would be checking the property:

history.previous

但是，它不起作用。问题在于，在大多数浏览器中，这被视为安全违规，通常只返回未定义。

However, it won't work. The problem with this is that in most browsers this is considered a security violation and usually just returns undefined.

history.length

属性其他人建议...

但是，长度不能完全发挥作用，因为它并不表示历史记录中的 where 。此外，它并不总是以相同的数字开头。例如，未设置为登录页面的浏览器从0开始，而使用朗读页面的另一个浏览器将从1开始。

Is a property that others have suggested...
However, the length doesn't work completely because it doesn't indicate where in the history you are. Additionally, it doesn't always start at the same number. A browser not set to have a landing page, for example, starts at 0 while another browser that uses a langing page will start at 1.

大部分时间都添加了一个调用链接：

Most of the time a link is added that calls:

history.back();

或

 history.go(-1);

如果你不能回去，那么点击链接什么都不做。

and it's just expected that if you can't go back then clicking the link does nothing.

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