Svelte with addon-viewport throws TypeError

[KhaledPendleton]

The Rundown
Trying to run Storybook results in the error listed below. Upon further research I found that in the file node_modules/@storybook/svelte/dist/client/preview/globals.js a string with the value of "svelte" is trying to be assigned to the property STORYBOOK_ENV on the non-existent window property on _global (Code included below for clarity). Setting window equal to an empty object does stop the error from occurring BUT then the Storybook webpage no longer loads.

I followed the tutorial for @storybook/addon-viewport that can be found here. The tutorial is specifically for React but I figured the logic would be the same for Svelte. Has anyone else encountered this problem/ is there a fix?

// node_modules/@storybook/svelte/dist/client/preview/globals.js
"use strict";

var _global = require("global");

// _global.window === null
_global.window.STORYBOOK_ENV = 'svelte';

My code

// .storybook/main.js
const { addParameters } = require('@storybook/svelte');
const newViewports = {
         iPhone11Pro: {
		name: 'Apple iPhone 11 Pro',
		styles: { width: '375px', height: '812px' },
		type: 'mobile'
	},
	iPhone11ProMax: {
		name: 'Apple iPhone 11 Pro Max',
		styles: { width: '414px', height: '896px' },
		type: 'mobile'
	},
};

addParameters({
	viewport: {
		viewports: { ...newViewports }
	}
});

module.exports = {
	stories: ['../src/components/**/*.stories.js'],
	addons: [
		'@storybook/addon-actions',
		'@storybook/addon-links',
		'@storybook/addon-viewport/register'
	]
};

The error

TypeError: Cannot set property 'STORYBOOK_ENV' of undefined
ERR!     at Object.<anonymous> (/Users/khaled/Sites/clients/bdc/node_modules/@storybook/svelte/dist/client/preview/globals.js:5:30)
ERR!     at Module._compile (internal/modules/cjs/loader.js:971:30)
ERR!     at Object.Module._extensions..js (internal/modules/cjs/loader.js:1011:10)
ERR!     at Module.load (internal/modules/cjs/loader.js:822:32)
ERR!     at Function.Module._load (internal/modules/cjs/loader.js:730:14)
ERR!     at Module.require (internal/modules/cjs/loader.js:864:19)
ERR!     at require (internal/modules/cjs/helpers.js:74:18)
ERR!     at Object.<anonymous> (/Users/khaled/Sites/clients/bdc/node_modules/@storybook/svelte/dist/client/preview/index.js:12:1)
ERR!     at Module._compile (internal/modules/cjs/loader.js:971:30)
ERR!     at Object.Module._extensions..js (internal/modules/cjs/loader.js:1011:10)
ERR!     at Module.load (internal/modules/cjs/loader.js:822:32)
ERR!     at Function.Module._load (internal/modules/cjs/loader.js:730:14)
ERR!     at Module.require (internal/modules/cjs/loader.js:864:19)
ERR!     at require (internal/modules/cjs/helpers.js:74:18)
ERR!     at Object.<anonymous> (/Users/khaled/Sites/clients/bdc/node_modules/@storybook/svelte/dist/client/index.js:55:16)
ERR!     at Module._compile (internal/modules/cjs/loader.js:971:30) {
ERR!   stack: "TypeError: Cannot set property 'STORYBOOK_ENV' of undefined\n" +
ERR!     '    at Object.<anonymous> (/Users/khaled/Sites/clients/bdc/node_modules/@storybook/svelte/dist/client/preview/globals.js:5:30)\n' +
ERR!     '    at Module._compile (internal/modules/cjs/loader.js:971:30)\n' +
ERR!     '    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1011:10)\n' +
ERR!     '    at Module.load (internal/modules/cjs/loader.js:822:32)\n' +
ERR!     '    at Function.Module._load (internal/modules/cjs/loader.js:730:14)\n' +
ERR!     '    at Module.require (internal/modules/cjs/loader.js:864:19)\n' +
ERR!     '    at require (internal/modules/cjs/helpers.js:74:18)\n' +
ERR!     '    at Object.<anonymous> (/Users/khaled/Sites/clients/bdc/node_modules/@storybook/svelte/dist/client/preview/index.js:12:1)\n' +
ERR!     '    at Module._compile (internal/modules/cjs/loader.js:971:30)\n' +
ERR!     '    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1011:10)\n' +
ERR!     '    at Module.load (internal/modules/cjs/loader.js:822:32)\n' +
ERR!     '    at Function.Module._load (internal/modules/cjs/loader.js:730:14)\n' +
ERR!     '    at Module.require (internal/modules/cjs/loader.js:864:19)\n' +
ERR!     '    at require (internal/modules/cjs/helpers.js:74:18)\n' +
ERR!     '    at Object.<anonymous> (/Users/khaled/Sites/clients/bdc/node_modules/@storybook/svelte/dist/client/index.js:55:16)\n' +
ERR!     '    at Module._compile (internal/modules/cjs/loader.js:971:30)'
ERR! }

[KhaledPendleton]

This is my first time submitting an issue, sorry in advance if I made any sort of mistakes with my post

[stale]

Hi everyone! Seems like there hasn't been much going on in this issue lately. If there are still questions, comments, or bugs, please feel free to continue the discussion. Unfortunately, we don't have time to get to every issue. We are always open to contributions so please send us a pull request if you would like to help. Inactive issues will be closed after 30 days. Thanks!

[stale]

Hey there, it's me again! I am going close this issue to help our maintainers focus on the current development roadmap instead. If the issue mentioned is still a concern, please open a new ticket and mention this old one. Cheers and thanks for using Storybook!