Detect use of Android back button using JavaScript

Question

My site has breadcrumbs which highlight which stage in a process the user has reached. The breadcrumbs rely on the browser history to tell which stage should be highlighted when

Answer 1

1. Use popstate event.

https://developer.mozilla.org/en-US/docs/Web/Events/popstate

window.onpopstate = function(e) { 
   updateBreadCrumbObservable();
};

2. Use onhashchange event.

window.onhashchange = function(e) {
   updateBreadCrumbObservable();
}

You can use event argument to get more description about the event fired.