add product quantity input modifier in woocommerce mini-cart.php - php

Question

in the woocommerce mini-cart I'd like to display an input to adjust the quantity of each product.
I added line in the mini-cart.php file of my Storefront child theme (using the function woocommerce_quantity_input), it displays the input, but the cart is not 'updated'.
Any idea how to do this?
See the last line of:
foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
$_product = apply_filters( 'woocommerce_cart_item_product', $cart_item['data'], $cart_item, $cart_item_key );
$product_id = apply_filters( 'woocommerce_cart_item_product_id', $cart_item['product_id'], $cart_item, $cart_item_key );
if ( $_product && $_product->exists() && $cart_item['quantity'] > 0 && apply_filters( 'woocommerce_widget_cart_item_visible', true, $cart_item, $cart_item_key ) ) {
$product_name = apply_filters( 'woocommerce_cart_item_name', $_product->get_name(), $cart_item, $cart_item_key );
$thumbnail = apply_filters( 'woocommerce_cart_item_thumbnail', $_product->get_image(), $cart_item, $cart_item_key );
$product_price = apply_filters( 'woocommerce_cart_item_price', WC()->cart->get_product_price( $_product ), $cart_item, $cart_item_key );
$product_permalink = apply_filters( 'woocommerce_cart_item_permalink', $_product->is_visible() ? $_product->get_permalink( $cart_item ) : '', $cart_item, $cart_item_key );
?>
<li class="woocommerce-mini-cart-item <?php echo esc_attr( apply_filters( 'woocommerce_mini_cart_item_class', 'mini_cart_item', $cart_item, $cart_item_key ) ); ?>">
<?php
//split product name and color
$pattern = '/ [^a-zA-Z0-9 ]+| –/';
$matches = array();
$dummy = preg_match($pattern, $product_name, $matches);
$posi = strpos($product_name, $matches[0]);
$productnamename = substr($product_name, 0, $posi);
$dashAndProductcolor = substr($product_name, $posi);
?>
<?php if ( empty( $product_permalink ) ) : ?>
<?php echo $thumbnail; ?>
<?php echo '<span class="minicart-prod-name">'.$productnamename.'</span><br/>' ?>
<?php echo '<span class="minicart-prod-color">'.$dashAndProductcolor.'</span>' ?>
<?php else : ?>
<a href="<?php echo esc_url( $product_permalink ); ?>">
<?php echo $thumbnail; ?>
<?php echo '<span class="minicart-prod-name">'.$productnamename.'</span><br/>' ?>
<?php echo wc_get_formatted_cart_item_data( $cart_item ); ?>
<?php echo '<span class="minicart-prod-color">'.$dashAndProductcolor.'</span>' ?>
</a>
<?php echo apply_filters( 'woocommerce_widget_cart_item_quantity', '<span class="each-price">' . sprintf( '%s', $product_price ) . '</span>', $cart_item, $cart_item_key ); ?>
<?php endif; ?>
<?php echo apply_filters( 'woocommerce_widget_cart_item_quantity', '<span class="quantity">' . sprintf( '%s', $cart_item['quantity'] ) . '</span>', $cart_item, $cart_item_key ); ?>
<?php
echo woocommerce_quantity_input( array('input_value' => $cart_item['quantity']),$cart_item['data'], false );
?>