Help with proper refresh cart

Hello.

I’ve been stuck for a few days with such easy thing as how to get proper refresh cart after changing quantity of products, that already added to cart. For purposes of design custom theme I do some modifications in copied files.
What done already:
1) Upgraded cart.js

var cart = { 
   this.qty_click = this.qty_click.bind(this);
			$(document).on(
				'click',
				'.quantity img',
				this.qty_click);
: function (evt) {
						var $clicked = $(evt.target);
						var qty = $('.quantity').find('.qty');
						var currVal = qty.val();
						var $form = $('.woocommerce #doorCart');

						$('<input />').attr('type', 'hidden')
							.attr('name', 'update_cart')
							.attr('value', 'Update Cart')
							.appendTo($form);

						if ($clicked.is('.minus')) {
							evt.preventDefault();
							if (currVal > 0) {
								var newVal = parseFloat(qty.val()) - 1;
							} else {
								newVal = 0;
							}
						};
						if ($clicked.is('.plus')) {
							evt.preventDefault();
								newVal = parseFloat(qty.val()) + 1;
						};

							qty.attr('data-quantity', newVal).change();
							qty.attr( 'value', newVal ).change();
	

2) added custom filter in functions.php

add_action( 'woocommerce_after_cart', 'custom_after_cart' );
function custom_after_cart() {
	echo '<script>
	jQuery(document).ready(function($) {
		var upd_cart_btn = $(".update-cart-button");
		upd_cart_btn.hide();
		$("#doorCart").find(".qty").on("change", function(){
			upd_cart_btn.trigger("wc_update_cart");
		});
	});
	</script>';
}

3) edited quantity-input.php

<img src="<?php echo get_template_directory_uri() ?>/assets/img/minus.png" alt="" name="minus" class="minus copy-<?php echo esc_attr( $input_value ); ?>"/>
	<input type="number" step="<?php echo esc_attr( $step ); ?>" min="<?php echo esc_attr( $min_value ); ?>" max="<?php echo esc_attr( $max_value ); ?>" name="<?php echo esc_attr( $input_name ); ?>" value="<?php echo esc_attr( $input_value ); ?>" data-quantity="<?php echo esc_attr( $input_value ); ?>"  title="<?php echo esc_attr_x( 'Qty', 'Product quantity input tooltip', 'woocommerce' ) ?>" class="input-text qty text exo2Medium" size="4" pattern="<?php echo esc_attr( $pattern ); ?>" inputmode="<?php echo esc_attr( $inputmode ); ?>"/>
<img src="<?php echo get_template_directory_uri() ?>/assets/img/plus.png" alt="" name="plus" class="plus copy-<?php echo esc_attr( $input_value ); ?>"/>

What I expects from all of this?
I need that cart will b able to refresh and store changes after all user-driven changes made. But this is not happen. Quantity changes, but not stores, total price didn’t changes at all.

Is it possible to find somewhere materials, how this could properly be done? I have tried to search for a few days, but still have no results.

As all it doing at local computer I can’t provide link to the site for a live demo.

Status report is following:

### WordPress Environment ###

Home URL: https://doorstorewp
Site URL: https://doorstorewp
WC Version: 2.6.14
Log Directory Writable: ?
WP Version: 4.7.2
WP Multisite: –
WP Memory Limit: 2 GB
WP Debug Mode: –
WP Cron: ?
Language: ru_RU

### Server Environment ###

Server Info: Apache
PHP Version: 7.1.0
PHP Post Max Size: 100 MB
PHP Time Limit: 180
PHP Max Input Vars: 1000
cURL Version: 7.51.0
OpenSSL/1.0.2j

SUHOSIN Installed: –
MySQL Version: 5.7.16
Max Upload Size: 100 MB
Default Timezone is UTC: ?
fsockopen/cURL: ?
SoapClient: ?
DOMDocument: ?
GZip: ?
Multibyte String: ?
Удалить запись: ?
Удалённое получение: ?

### Database ###

WC Database Version: 2.6.14
: 
woocommerce_sessions: ?
woocommerce_api_keys: ?
woocommerce_attribute_taxonomies: ?
woocommerce_downloadable_product_permissions: ?
woocommerce_order_items: ?
woocommerce_order_itemmeta: ?
woocommerce_tax_rates: ?
woocommerce_tax_rate_locations: ?
woocommerce_shipping_zones: ?
woocommerce_shipping_zone_locations: ?
woocommerce_shipping_zone_methods: ?
woocommerce_payment_tokens: ?
woocommerce_payment_tokenmeta: ?
MaxMind GeoIP Database: ? Базы данных MaxMind GeoIP не существует - геолокация не будет функционировать. Вы можете скачать это вручную из https://dev.maxmind.com/geoip/legacy/geolite/ и установить в директорию: . Скрольте вниз до \"Downloads\" и выбирайте файл \"Binary / gzip\" рядом с \"GeoLite Country\".

### Active Plugins (7) ###

Advanced Custom Fields: Repeater Field: от Elliot Condon – 1.1.1
Advanced Custom Fields: от Elliot Condon – 4.4.11
Breadcrumb NavXT: от John Havlik – 5.6.0
Oi Yandex.Maps for WordPress: от Alexei Isaenko – 2.42
Regenerate Thumbnails: от Alex Mills (Viper007Bond) – 2.2.6
TinyMCE Advanced: от Andrew Ozz – 4.4.3
WooCommerce: от WooThemes – 2.6.14

### Settings ###

Force SSL: –
Currency: RUB (?)
Currency Position: right_space
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 0

### API ###

API Enabled: ?

### WC Pages ###

Ссылка магазина: #4 - /%d0%b2%d0%b8%d1%82%d1%80%d0%b8%d0%bd%d0%b0/
Корзина: #5 - /%d0%ba%d0%be%d1%80%d0%b7%d0%b8%d0%bd%d0%b0/
Оформление заказа: #6 - /%d0%be%d1%84%d0%be%d1%80%d0%bc%d0%bb%d0%b5%d0%bd%d0%b8%d0%b5-%d0%b7%d0%b0%d0%ba%d0%b0%d0%b7%d0%b0/
Мой аккаунт: ? Страница не задана

### Taxonomies ###

Product Types: external (external)
grouped (grouped)
simple (simple)
variable (variable)

### Theme ###

Name: DoorStore
Version: 1.0.0
Author URL: 
Child Theme: ? 
WooCommerce Support: ?

### Templates ###

Overrides: DoorStore/woocommerce/cart\cart-empty.php
DoorStore/woocommerce/cart\cart-totals.php
DoorStore/woocommerce/cart\cart.php
DoorStore/woocommerce/cart\proceed-to-checkout-button.php
DoorStore/woocommerce/content-product.php
DoorStore/woocommerce/content-single-product.php
DoorStore/woocommerce/global\quantity-input.php
DoorStore/woocommerce/loop\add-to-cart.php версия - устарела. Версия ядра 2.5.0
DoorStore/woocommerce/notices\error.php
DoorStore/woocommerce/notices\notice.php
DoorStore/woocommerce/notices\success.php
DoorStore/woocommerce/single-product.php

thanks in advance. hope you can help.