stop css target being affected by backbutton - html

Question

I use the target selector to put and remove a class that shows and hides the navigation menu. The problem is that when a user uses the backbutton on the browser the menu states get messed up.
This is my css code
<style>
#buttons-container a.close-menu-primary{display: none;}
#wrap:target #mainmenu{display: block;}
#wrap:target #buttons-container a.open-menu-primary{display: none;}
#wrap:target #buttons-container a.close-menu-primary{display: block;}
</style>
buttons-container is a div with two buttons, open-menu-primary & close-menu-primary, that toggle each other on and off and show or hide the mainmenu.
The problem occurs when someone uses the back button. In that case it only toggles the button states between open and close-menu-primary, which are a burger and a close image.
You can check the live version here if you make the browser small enough or use a mobile device, screen size has to be smaller than (min-width: 768px) and (min-height: 558px) website with toggle by target selector
Hope someone can clear this up if it is possible to use target this way or if there better ways to get this affect without scripting please.
Thanks in advance!

Answer 1

The question is... when user presses the back button, do you want to go back one state of menu visibility (ie. hide it or unhide it), or do you want to go back one page?
I check your linked page http://www.rieon.nl. I think this is the problem:
I presume you want the user to go back one page, not just to hide the menu. Then, you need to change this piece of code
jQuery( document ).ready(function( $ ) {
$("#buttons-container a").click(function(){
$("nav").toggleClass("main");
});
});
and add either return false or e.preventDefault():
jQuery( document ).ready(function( $ ) {
$("#buttons-container a").click(function(e){
$("nav").toggleClass("main");
e.preventDefault(); // use either one
return false; // of these lines
});
});
The problem is that by clicking on the link on navigation button, browser executes the javascript handler that shows the menu AND navigates to link's href address (which is #wrap) and that creates a new step in its history, so that when user hits back button, browser just goes back to previous state (which is usually the same page but without #wrap). By adding return false (that's jQuery speciality) or calling preventDefault() on event object (that's standard JS), you cancel the navigation and leave only your own handler to be executed.