JSFiddle - React, Tailwind, and code Playground

JavaScript

const app = {
  self: this,
  enums: {
    ROCK: 'ROCK',
    PAPER: 'PAPER',
    SCISSORS: 'SCISSORS',
    DEFAULT_USER_CHOICE: this.ROCK //default, take note of this keyword
  },
  prop: {
    isGameRunning: false,
    mySelection: self.enums.ROCK
  }
};

alert(app.prop.mySelection);