how to clean the cart when leaving the woocommerce website

I’m using this code to clean the cart:

/ * empty cart if user come to homepage * /
add_action (‘init’, ‘woocommerce_clear_cart_url’);
function woocommerce_clear_cart_url () {
global $ woocommerce;

if ($ _SERVER [‘REQUEST_URI’] === ‘/’) {
$ woocommerce-> cart-> empty_cart ();
}
}
It cleans when I access the main page, I would like it to clean every time the client closes my site.