小编vin*_*nce的帖子

我正在使用 Ionic 3，但我需要知道如何将 angular 依赖项从 5.0.0 降级到 4.3.3

"dependencies": {
    "@angular/common": "5.0.0",
    "@angular/compiler": "5.0.0",
    "@angular/compiler-cli": "5.0.0",
    "@angular/core": "5.0.0",
    "@angular/forms": "5.0.0",
    "@angular/http": "5.0.0",
    "@angular/platform-browser": "5.0.0",
    "@angular/platform-browser-dynamic": "5.0.0",
    "@ionic-native/core": "4.3.2",
    "@ionic-native/splash-screen": "4.3.2",
    "@ionic-native/status-bar": "4.3.2",
    "@ionic/pro": "1.0.12",
    "@ionic/storage": "2.1.3",
    "ionic-angular": "3.9.2",
    "ionicons": "3.0.0",
    "rxjs": "5.5.2",
    "sw-toolbox": "3.6.0",
    "zone.js": "0.8.18"
  },

筛选器挂钩woocommerce_sections_shipping无法将部分标签添加到woocommerce运送设置中：

 if ( ! class_exists('WC_Shipping_Calculator')){
    class WC_Shipping_Calculator{
        public function __construct(){

            add_filter('woocommerce_get_settings_shipping', array( $this, 'add_settings_tab'), 100);
            //add_filter('woocommerce_settings_tabs_array', array( $this, 'add_settings_tab'), 100);
            //add_filter('woocommerce_sections_shipping_array', array( $this, 'add_settings_tab'), 100);
        }

        public function add_settings_tab($settings_tabs){
            $settings_tabs['shipping_calculator'] = __('Shipping Calculator', 'shipping-calculator');
            return $settings_tabs;

        }
    }
}

$GLOBAL['wc_shipping_calculator'] = new WC_Shipping_Calculator();

我可以用来为woocommerce运送设置添加部分标签的过滤器是什么？