javascript - How to detect the back button

Question

I've set up a page where I'm using the following code so when you click on a link the content and URL changes without refreshing:

window.history.pushState("object or string", "title", "/photo.php");

But when a user clicks on the back button the content doesn't change back. How to detect the back button?

Answer 1

You can use onpopstate, like this. It will be fired when the navigation buttons are used, too.

http://jsfiddle.net/54LfW/4/

window.onpopstate = function(e) { // executed when using the back button for example
    alert("Current location: " + location.href); // location.href is current location

    var data = e.state;
    if(data) {
        alert(JSON.stringify(e.state)); // additional data like your "object or string"
    }
};