Untitled

function IncreaseMyCart(variantID,plusquantity) {
    var xhr = new XMLHttpRequest();
    var url = "/cart/change.js";
    xhr.open("POST", url, true);
    xhr.setRequestHeader("Content-Type", "application/json");
    xhr.onreadystatechange = function () {
      if (xhr.readyState === 4 && xhr.status === 200) {
          var parsedState = JSON.parse(xhr.responseText);
          //window.scrollTo({top: 0, behavior: 'smooth'});
          document.querySelector('cart-notification').renderContentsedit(parsedState);
      }
    };
    var sectionsToRender = ["cart-notification-productedit", "cart-notification-button", "cart-icon-bubble"];
    var sections_url = window.location.pathname;
    var data = JSON.stringify({"quantity": plusquantity, "id": variantID, "sections" : sectionsToRender, "sections_url" :sections_url });
    xhr.send(data);
}

^^starts here^^^^^^^^

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it then continues:


  renderContentsedit(parsedState) {
      document.getElementById("cart-notification-default").innerHTML="";
      this.productId = parsedState.id;
      this.getSectionsToRenderedit().forEach((section => {
        document.getElementById(section.id).innerHTML =
          this.getSectionInnerHTML(parsedState.sections[section.id], section.selector);
      }));
    
    //document.getElementsByClassName("cart-logo")[0].addEventListener("click", this.open.bind(this));
	var dropDownIcon = document.querySelector('#cart-icon-bubble');
    if(dropDownIcon.getAttribute("aria-expanded") == "false")
    {
    	dropDownIcon.click();
    }      
    //if (this.header) this.header.reveal();
    //this.open();
  }

  getSectionsToRenderedit() {
    return [
      {
        id: 'cart-notification-productedit',
       // selector: `#cart-notification-product-${this.productId}`,
      },
      {
        id: 'cart-notification-button'
      },
      {
        id: 'cart-icon-bubble'
      }
    ];
  }






then I think those two codes work together:

  getSectionInnerHTML(html, selector = '.shopify-section') {
    return new DOMParser()
      .parseFromString(html, 'text/html')
      .querySelector(selector).innerHTML;
  }

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getSectionsToRender() {
    return [
      {
        id: 'main-cart-items',
        section: document.getElementById('main-cart-items').dataset.id,
        selector: '.js-contents',
      },
      {
        id: 'cart-icon-bubble',
        section: 'cart-icon-bubble',
        selector: '.shopify-section'
      },
      {
        id: 'cart-notification',
        section: 'cart-notification-product',
        selector: '.shopify-section'
      },
      {
        id: 'cart-notification-product-edit',
        section: 'cart-notification-product',
        selector: '.shopify-section'
      },
      {
        id: 'cart-live-region-text',
        section: 'cart-live-region-text',
        selector: '.shopify-section'
      },
      {
        id: 'main-cart-footer',
        section: document.getElementById('main-cart-footer').dataset.id,
        selector: '.js-contents',
      }
    ];
  }