ionic 如何创建webview

Question

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import { WebView } from '@ionic-native/ionic-webview/ngx';


/**
 * Generated class for the ShopPage page.
 *
 * See https://ionicframework.com/docs/components/#navigation for more info on
 * Ionic pages and navigation.
 */

@IonicPage()
@Component({
  selector: 'page-shop',
  templateUrl: 'shop.html',
})
export class ShopPage {

  constructor(public navCtrl: NavController, public navParams: NavParams,private webview: WebView) {
  }

  ionViewDidLoad() {
    console.log('ionViewDidLoad ShopPage');
  }

}

已经引入组件了，但是该怎么打开webview，官方文档也就简单的一句话让我引用组件。