How to do it...

1. Open your command-line application and navigate to your workspace.
2.  Create a new folder named 3-05-starting-with-resolve.
3. Copy or create an index.html that loads and runs a main function from main.js.
4. Create a main.js file that calls Promise.resolve with an empty object as the first argument:

export function main () { 
  Promise.resolve({}) 
} 

5. Chain a then call off of resolve, and attach rocket boosters to the passed object:

export function main () { 
  Promise.resolve({}).then(function (rocket) {
      console.log('attaching boosters');
      rocket.boosters = [{
        count: 2,
        fuelType: 'solid'
      }, {
        count: 1,
        fuelType: 'liquid'
      }];
      return rocket;
    })
}

6. Add a final then call to the chain that lets you know when the boosters have been added:

export function main () { 
  Promise.resolve({}) 
    .then(function (rocket) { 
      console.log('attaching boosters'); 
      rocket.boosters = [{ 
        count: 2, 
        fuelType: 'solid' 
      }, { 
        count: 1, 
        fuelType: 'liquid' 
      }]; 
      return rocket; 
    }) 
    .then(function (rocket) {
      console.log('boosters attached');
      console.log(rocket);
    })
}

7. Start your Python web server and open the following link in your browser: http://localhost:8000/.

8. You should see the following output: