When I click on the + – sign on the minicart, it increases or decrease the quantity correctly.
I just want add loader, When customer click on the + or – sign it shows the loader then update the quantity
My template
app/design/frontend/vednor/themes/Magento_Checkout/web/template/minicart/item/default.html
<li class="item product-item cart-item d-flex align-items-center" data-role="product-item">
<!-- ko if: product_has_url -->
<div class="product-item-photo product-img">
<a data-bind="attr: {href: product_url, title: product_name}" tabindex="-1" class="product-item-photo">
<!-- ko foreach: $parent.getRegion('itemImage') -->
<!-- ko template: {name: getTemplate(), data: item.product_image} --><!-- /ko -->
<!-- /ko -->
</a>
</div>
<!-- /ko -->
<!-- ko ifnot: product_has_url -->
<div class="product-item-photo product-img">
<!-- ko foreach: $parent.getRegion('itemImage') -->
<!-- ko template: {name: getTemplate(), data: item.product_image} --><!-- /ko -->
<!-- /ko -->
</div>
<!-- /ko -->
<div class="product-item-details product-text">
<!-- ko if: product_has_url -->
<a class="product-description" data-bind="attr: {href: product_url}, text: product_name"></a>
<!-- /ko -->
<!-- ko ifnot: product_has_url -->
<!-- ko text: product_name --><!-- /ko -->
<!-- /ko -->
<!-- Display Total Waste Cost for Quantity -->
<div data-bind="text: 'Total Waste Cost: ' + (waste_cost ? (parseFloat(waste_cost) * qty).toFixed(2) : 'N/A')"></div>
<!-- Quantity Controls -->
<div class="details-qty qty d-flex align-items-center product-quantity-box">
<button class="decrease-qty" data-bind="click: function() { $parent.decreaseQty(item_id) }, enable: qty > 1">-</button>
<input data-bind="attr: {
id: 'cart-item-'+item_id+'-qty',
'data-cart-item': item_id,
'data-item-qty': qty,
'data-cart-item-id': product_sku
}, value: qty"
type="number"
size="4"
class="item-qty cart-item-qty" style="width: 35px; text-align: center" readonly/>
<button class="increase-qty" data-bind="click: function() { $parent.increaseQty(item_id) }">+</button>
</div>
<!-- ko if: options.length -->
<div class="options product-description" data-mage-init='{"collapsible":{"openedState": "active", "saveState": false}}'>
<span data-role="title" class="toggle"><!-- ko i18n: 'See Details' --><!-- /ko --></span>
<div data-role="content" class="content product-description">
<strong class="subtitle"><!-- ko i18n: 'Options Details' --><!-- /ko --></strong>
<dl class="options list">
<!-- ko foreach: { data: options, as: 'option' } -->
<dt class="label"><!-- ko text: option.label --><!-- /ko --></dt>
<dd class="values">
<!-- ko if: Array.isArray(option.value) -->
<span data-bind="html: option.value.join('<br>')"></span>
<!-- /ko -->
<!-- ko ifnot: Array.isArray(option.value) -->
<span data-bind="html: option.value"></span>
<!-- /ko -->
</dd>
<!-- /ko -->
</dl>
</div>
</div>
<!-- /ko -->
<div class="product-item-pricing product-price d-flex justify-content-between">
<!-- ko if: canApplyMsrp -->
<div class="details-map product-price">
<span class="label" data-bind="i18n: 'Price'"></span>
<span class="value" data-bind="i18n: 'See price before order confirmation.'"></span>
</div>
<!-- /ko -->
<!-- ko ifnot: canApplyMsrp -->
<!-- ko foreach: $parent.getRegion('priceSidebar') -->
<!-- ko template: {name: getTemplate(), data: item.product_price, as: 'price'} --><!-- /ko -->
<!-- /ko -->
<!-- /ko -->
</div>
<div class="actions">
<!-- ko if: is_visible_in_site_visibility -->
<div class="primary">
<a data-bind="attr: {href: configure_url, title: $t('Edit item')}" class="action edit">
<span data-bind="i18n: 'Edit'"></span>
</a>
</div>
<!-- /ko -->
<div class="secondary">
<a href="#" data-bind="attr: {'data-cart-item': item_id, title: $t('Remove item')}" class="action delete">
<span data-bind="i18n: 'Remove'"></span>
</a>
</div>
</div>
</div>
</li>
<div class="message notice" data-bind="visible: $data.message">
<div data-bind="text: $data.message"></div>
</div>