Is there a way in History.js to know when the back button was pressed

Question

I've started to test History.js. After understanding how it works and that there is no popstate, instead there is statechange. I'm looking for a way to differ when the back button of the browser has been pressed.

The reason is that I need to know the URL before the state moved, from the one I'm going to. With the gist the project includes, only the URL we go to is looked.

I hope the solution is not to track latest URL visited in a global variable.

Thanks

Answer 1

I found the solutions on github to be a bit overdone for my purposes. I created a bool that is always true except right before when I used History to change the state.

var manualStateChange = true;

History.Adapter.bind(window,'statechange',function(){
    if(manualStateChange == true){
     // BACK BUTTON WAS PRESSED
    }
    manualStateChange = true;
});

Any time I change the state programmatically, set the bool to false:

manualStateChange = false;
History.pushState(null, null, currentPath);