chrome/browser/resources/settings/open_window_proxy.ts

// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

/**
 * @fileoverview A helper object used to open a URL in a new tab.
 * the browser.
 */

export interface OpenWindowProxy {
  /**
   * Opens the specified URL in a new tab.
   */
  openURL(url: string): void;
}

export class OpenWindowProxyImpl implements OpenWindowProxy {
  openURL(url: string) {
    window.open(url);
  }

  static getInstance(): OpenWindowProxy {
    return instance || (instance = new OpenWindowProxyImpl());
  }

  static setInstance(obj: OpenWindowProxy) {
    instance = obj;
  }
}

let instance: OpenWindowProxy|null = null;