Get price once you are in the cart - javascript

For my studies I'm working on a e-commerce website and I need to upgrade my work by getting the price of my articles only on the cart page (I can't put it in the localstorage because price can change and it will not affect the cart items), I'm totally lost..
Here is my project https://github.com/Altaryxa/kanap.git
Thanks for your help

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Cart Items appear under total

Does anyone have time for call on discord to help me solve my problem;
Everything was normal till i code a add to cart in javascript,and it doesn't change total price etc.

Unable to Send Cart Details to Paypal

I am using this https://cdnjs.cloudflare.com/ajax/libs/minicart/3.0.6/minicart.min.js script to render a cart for my e-commerce website. This works pretty fine as I can add and remove items from the cart and view the subtotal. However, when it comes to linking with paypal (the main reason I think it was designed), I am unable to submit the cart details, i.e. all items' names and prices along with the total to paypal for processing payment. Can someone have a look and help me understand how to do this. At least, retrieve the price and quantity of each item and the total. If I can access these at any point in my application, that would be a great start.
Please find here a snippet of my use of the script to add an item to cart.
This is my inclusion of the javascript.
This is how it looks like in view.
You have add the shopping cart variables to pass your cart details to PayPal
Please find the below link,
https://developer.paypal.com/docs/classic/paypal-payments-standard/integration-guide/Appx_websitestandard_htmlvariables/#shopping-cart-variables

WooCommerce - Display updated mini cart widget with updated cart contents/totals after using add_to_cart

We are doing some custom changes to our WooCommerce.
We are calling successfully:
WC()->cart->add_to_cart($PRODUCT_ID)
The product appears in the cart when we click on the cart icon.
However, what I cannot figure out is how to trigger automatically on the front-end the small mini-cart widget that appears when you use the regular 'Add to Cart' button on regular product pages.
What other calls do I need to make to have the same front-end behavior that occurs when you add a regular item to the cart.
Basically, I want to just show the user that the item was successfully added to the cart. It should display the message that the item was added to the cart and update the cart total in the top right corner.
Any help greatly appreciated.
Thank you.
So you are adding product to cart through you custom code and want to update the mini cart at the sane time. So you must be adding the product to cart on some ajax event, and then displaying the message. What you have to do is use wc_get_template function of woocommerce and load the mini-cart.php template and return this template html to your ajax request and as soon as ajax is successful output this html into the mini cart container. It will update the quantities and subtotal as well.

Magneto 2 not getting custome option price calculation on catalog product view page

I newly start work on magento 2.
I have to active bellow functionality,
http://www.netcurtain2curtains.co.uk/lady-jayne-white-net-curtain-inspired-by-nottingham-lace.html
I was implimenting this functionality 1.9 but i have no idea how to do this in magento2.
Please share your idea with me so I can short it out my problem
Thanks in advance.
In magento2 we can set different price for child products of a simple product. So please make 'size' as a product attribute and set different price according to the size.

Refresh/update shopping cart when I change quantity - PhP

I'm currently making a webshop with php. I want to know how I can refresh the page when the user changes the quantity of a product, so it can recalculate the total price.
Is there an easy way to do this with php? Or with another language like javascript. Examples or projects with the same topic are welcome :)
Thank you

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