src/stores/lib/Reaction.js


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// @flow
import { autorun } from 'mobx';

export default class Reaction {
  reaction;

  isRunning = false;

  dispose;

  constructor(reaction) {
    this.reaction = reaction;
  }

  start() {
    if (!this.isRunning) {
      this.dispose = autorun(() => this.reaction());
      this.isRunning = true;
    }
  }

  stop() {
    if (this.isRunning) {
      this.dispose();
      this.isRunning = true;
    }
  }
}