How ionic creates webview

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/-sharpnavigation 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");
  }

}

has introduced the component, but how to open the webview, the official document is a simple sentence for me to reference the component.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b31768-2bd8c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b31768-2bd8c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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