Error: *.default is not a constructor

You need to export a default value which will look like:

export default class MapAction implements IMapAction {...

And import it as:

import MapAction from './map_action_file';

Alternatively, if you want to export multiple things from the module you can do something like:

export class MapAction ...
export class MapSomethng ...

And import it as follows:

import { MapAction, MapSomething } from './map_action_file';

Another solution would be to add "esModuleInterop": true, into tsconfig.json.

esModuleInterop allows default imports from modules with no default export.

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