How to automatically update minicart quantity without page refresh?

Hello all, we should like to update automatically the minicart when the quantity is changing without refreshing the page. When the quantity change the subtotal change but the amount for"alma 4 fois sans frais’" = amount/4 don t change (red arrow)

.

In the product page when you change the variant the price change without refreshing page but the same amount alma don t change without refreshing page. I needed toadd code in app.js.liquid at the bottom to refresh the page

jQuery(function() {

$(‘.single-option-selector’).on(‘change’, function(){

setTimeout(function(){

if($(‘[name=“id”]’).val() != “{{ product.selected_or_first_available_variant.id }}”){

location.reload();

}

if there is a possibility to update the amount without refreshing it will be better.

https://dev-3dcoiffure-01.myshopify.com/?ls=fr-FR

password: again

Regards

Pascal