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JavaScript

Posted by alex mattingley
alex mattingley
7,508 Points

onhashchange js event handler is not triggering with a url change.

I am working to build a single page app using both php and js/ajax. In order to detect when a user pushes the back button and wants to return to a previous page, I am using the js method onhashchange. I cannot figure out for the life of me why it is not triggering when the url changes.

Documentation on onhashchange from MDN:

https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onhashchange

A relevant stack overflow question:

http://stackoverflow.com/questions/25806608/how-to-detect-browser-back-button-event-cross-browser

I am using the last solution here that he/she talks about in the stackoverflow answer. Here is my code:

document.onmouseover = function() {
//User's mouse is inside the page. (This is working)
    window.innerDocClick = true;
}

document.onmouseleave = function() {
//User's mouse has left the page. (this is working)
    window.innerDocClick = false;
}

window.onhashchange = function() {
    console.log("on hash"); //This is not triggering, and it should be on each url change I think.
    if (window.innerDocClick) {
        console.log("you never left the window");
    } else {
        //Browser back button was clicked
        console.log("back button!");
    }
};