How to check if the user can go back in browser history or not

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Short answer: You can’t.

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

history.previous

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

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 landing page will start at 1.

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Most of the time a link is added that calls:

history.back();

or 

 history.go(-1);

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

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