Move initializer outside of performance callback (#3736)

Author: lhoffbeck

assets/cart.js

@@ -160,9 +160,9 @@ class CartItems extends HTMLElement {
         return response.text();
       })
       .then((state) => {
+        const parsedState = JSON.parse(state);
 
         CartPerformance.measure(`${eventTarget}:paint-updated-sections"`, () => {
-          const parsedState = JSON.parse(state);
           const quantityElement =
             document.getElementById(`Quantity-${line}`) || document.getElementById(`Drawer-quantity-${line}`);
           const items = document.querySelectorAll('.cart-item');