MobX decorators and other

If you want to use decorators in your view models you need to configure your build.
Most of the documentation uses accessor decorators that work only with Babel. You can replace them with makeObservable or extendObservable from MobX.

Base implementations of ViewModelStore and ViewModel are using makeObservable(this) in class constructor.

No-decorators approach

You need to disable the "decorators style" for wrapping base entities with MobX functions like makeObservable.
To achieve this, configure the global viewModelsConfig:

import { viewModelsConfig } from "mobx-view-model";

viewModelsConfig.observable.viewModels.useDecorators = false;

Example of usage:

import { observable, action } from "mobx";
import { ViewModelBase, ViewModelParams } from "mobx-view-model";

class YourViewModel extends ViewModelBase  {
  constructor(params: ViewModelParams) {
    super(params);

    makeObservable(this, {
      fruitName: observable,
      setFruitName: action.bound,
    })
  }

  fruitName: string = '';

  setFruitName(fruitName: string) {
    this.fruitName = fruitName;
  }
}