ECMAScript Cookbook

How to do it...

1. Open your command-line application and navigate to your workspace.
2. Create a new folder named 11-03-symbols-simulate-enums.
3. Create a main.js file that defines a new object named LaunchSite , property values of the object should be local Symbols:

// main.js 
const LaunchSite = { 
  KENNEDY_SPACE_CENTER: Symbol('Kennedy Space Center'), 
  WHITE_SANDS: Symbol('White Sands Missile Range'), 
  BAIKONUR: Symbol('Baikonur Cosmodrome'), 
  BROGLIO: Symbol('Broglio Space Center'), 
  VIKRAM_SARABHAI: Symbol('Vikram Sarabhai Space Centre') 
}   

4. Create a main function and compare the value of an enum entry to different values:

// main.js export function main() { console.log("Kennedy Space Center Site: ", LaunchSite.KENNEDY_SPACE_CENTER); console.log("Duplicate ...