ECMAScript Cookbook

How to do it...

1. Open your command-line application, and navigate to your workspace.
2. Create a new folder named 12-01-add-remove-from-set.
3. Copy or create an index.html that loads and runs a main function from main.js.
4. Create a main.js file that defines a main function. In that function, create a new Set instance, then add and remove a few items from it:

// main.jsexport function main() {    const rocketSet = new Set();    rocketSet.add('US: Saturn V');    rocketSet.add('US: Saturn V');    rocketSet.add('US: Falcon Heavy');    console.log(rocketSet);    rocketSet.delete('US: Falcon Heavy');    console.log(rocketSet);}

5. Start your Python web server, and open the following URL in your browser: http://localhost:8000/.

6. You will see the following output: