promise.js

gistfile1.js

const Time = require('Time');
const Diagnostics = require('Diagnostics');

let promise = new Promise((resolve, reject) => {
  Time.setTimeout(function() { resolve(1); } , 5000);
  // Time.setTimeout(function() { reject("Failed"); }, 5000);
});
promise.then(function(value) {
  Diagnostics.log("Then: " + value);
}).catch(function(reason) {
  Diagnostics.log("Catch: " + reason);
});

class Rectangle {
  constructor(height, width) {
    this.height = height;
    this.width = width;
  }
  // Getter
  get area() {
    return this.calcArea();
  }
  // Method
  calcArea() {
    return this.height * this.width;
  }
}

let r = new Rectangle(10, 20);
Diagnostics.log(r.area);


function resolveAfter2Seconds() {
  return new Promise(resolve => {
    Time.setTimeout(() => {
      resolve('resolved');
    }, 2000);
  });
}

async function asyncCall() {
  Diagnostics.log('calling');
  var result = await resolveAfter2Seconds();
  Diagnostics.log(result);
  // expected output: 'resolved'
}

asyncCall();