JavaScript

Prevent loading a webpage from Back-Forward cache

Published on August 30th, 2020


I'm working on an eCommerce project and I encountered a really weird problem, whenever I saved items into my cart and proceed to the checkout page and then go back to previous page, my cart isn't updated until I refresh the page.

Honestly, I thought this was a bug until I came around to learn about Back-Forward Caching a.k.a bfcache, which allows the user to navigate between pages faster. That's a good thing, though!

But that didn't help resolve my issue, so I thought of going around with a tiny hack:


window.onpageshow = function(event) {
    if (event.persisted) {
        window.location.reload() 
    }
};

The code above will look any persistence of the onpageshow event. Initially, it's set to false and if the page is loaded from bfcache, it'll set to true.

I wouldn't really consider this as a solution as it only worked on Safari instead of Chrome or Firefox.

But hey, it gets the job done! 😂