ReferenceError: window is not defined: Server side rendering❓

[Teebo]

I am using Editor.js with Angular.

In my code, I am checking if the window is available before I initialize Editor.js with the new keword.

When building for server-side rendering, I get an error that the window is undefined.
If I comment the Editor.js initialization, the SSR build succeeds, I reckon that the error is caused by Editor.js.

I also have domino to mock the window object with the below output.

<ref *2> {
  document: <ref *1> {
    parentNode: null,
    _previousSibling: [Circular *1],
    _nextSibling: [Circular *1],
    _index: undefined,
    _childNodes: null,
    _firstChild: {
      parentNode: [Circular *1],
      _previousSibling: [HTMLHtmlElement],
      _nextSibling: [HTMLHtmlElement],
      _index: undefined,
      nodeType: 10,
      ownerDocument: [Circular *1],
      name: 'html',
      publicId: '',
      systemId: '',
      _nid: 2
    },
    nodeType: 9,
    isHTML: true,
    _address: 'about:blank',
    readyState: 'loading',
    implementation: { contextObject: [Circular *1] },
    ownerDocument: null,
    _contentType: 'text/html',
    doctype: {
      parentNode: [Circular *1],
      _previousSibling: [HTMLHtmlElement],
      _nextSibling: [HTMLHtmlElement],
      _index: undefined,
      nodeType: 10,
      ownerDocument: [Circular *1],
      name: 'html',
      publicId: '',
      systemId: '',
      _nid: 2
    },
    documentElement: HTMLHtmlElement {
      parentNode: [Circular *1],
      _previousSibling: [Object],
      _nextSibling: [Object],
      _index: undefined,
      _childNodes: null,
      _firstChild: [HTMLHeadElement],
      nodeType: 1,
      ownerDocument: [Circular *1],
      localName: 'html',
      namespaceURI: 'http://www.w3.org/1999/xhtml',
      prefix: null,
      _tagName: undefined,
      _attrsByQName: [Object: null prototype],
      _attrsByLName: [Object: null prototype],
      _attrKeys: [Array],
      _nid: 3
    },
    _templateDocCache: null,
    _nodeIterators: null,
    _nid: 1,
    _nextnid: 34,
    _nodes: [
      null,                [Circular *1],
      [Object],            [HTMLHtmlElement],
      [HTMLHeadElement],   [Object],
      [HTMLMetaElement],   [Object],
      [HTMLTitleElement],  [Object],
      [Object],            [HTMLBaseElement],
      [Object],            [HTMLMetaElement],
      [Object],            [HTMLLinkElement],
      [Object],            [HTMLLinkElement],
      [Object],            [Object],
      [Object],            [HTMLLinkElement],
      [Object],            [HTMLBodyElement],
      [Object],            [HTMLUnknownElement],
      [Object],            [HTMLScriptElement],
      [HTMLScriptElement], [HTMLScriptElement],
      [HTMLScriptElement], [HTMLScriptElement],
      [HTMLScriptElement], [Object]
    ],
    byId: [Object: null prototype] {},
    modclock: 1,
    _scripting_enabled: true,
    defaultView: [Circular *2]
  },
  location: Location { _window: [Circular *2], _href: 'about:blank' }

The window object is available in the global scope of NodeJS when building for SSR.
Now I am just wondering what can be done to Editor.js to avoid this.

Is it possible to resolve this issue from Editor.js?
What can I do to circumvent this issue?
Why is new Editor(...) giving an error even when a check is being made if we are in the browser?
Why do I get the error even when the window object is available in Node?

[neSpecc]

Duplicated, see #1036