在ionic inAppBrowser中，我想要自定义关闭按钮

ionic cordova plugin add cordova-plugin-inappbrowser

import { InAppBrowser, InAppBrowserOptions } from '@ionic-native/in-app-browser/ngx';
import { Platform } from '@ionic/angular';

constructor(private iab: InAppBrowser, private platform: Platform) {}

openExternalUrl(url: string) {
  const options: InAppBrowserOptions = {
    location: 'no',
    closebuttoncaption: '关闭', // 自定义关闭按钮的文字
    disallowoverscroll: 'yes'
  };

  if (this.platform.is('cordova')) {
    const browser = this.iab.create(url, '_blank', options);
    browser.show();
  } else {
    window.open(url, '_system');
  }
}

<button (click)="openExternalUrl('https://www.example.com')">打开外部网页</button>