GameScalePlugin in phaser3-project-template (webpack)

index.js

import 'phaser';

import GameScalePlugin from 'phaser-plugin-game-scale';

console.assert(GameScalePlugin, 'GameScalePlugin');

var config = {
    type: Phaser.AUTO,
    width: 800,
    height: 600,
    scene: {
        preload: preload,
        create: create
    },
    plugins: {
      global: [{ key: 'GameScalePlugin', plugin: GameScalePlugin, mapping: 'gameScale' }]
    }
};

var game = new Phaser.Game(config);

function preload ()
{
    this.load.image('logo', 'assets/logo.png');
}

function create ()
{
    var logo = this.add.image(400, 150, 'logo');

    this.tweens.add({
        targets: logo,
        y: 450,
        duration: 2000,
        ease: 'Power2',
        yoyo: true,
        loop: -1
    });

    console.assert(this.gameScale, 'this.gameScale');
    console.log('this.gameScale', this.gameScale);

}