How to run ajax on both sides of the page load?

Question

AJAX

Good afternoon! There is a site in which the link "a" goes to a subpage of the site via Ajax
But if you go back, then the link changes - but the visible part itself does not. How to be?

Answer 1

HTML5 History API
onpopstate - catch "go back" event and do ajax on current url -> change content

Answer 2

Use good old pjax or barba js)