A javascript promise generator that queues tasks

tasks.js

/*
 * A promise generator that queues tasks
 */
function initTaskGenerator() {
   function yieldPromise(task) { // executed in yield expression
     return new Promise((resolve, reject) => {
     	 try {
         setTimeout(() => {
         	var value = typeof task === "function" ? task() : task;
         	resolve(value);
         }, 0);
       } catch (error) {
       	reject(error);
       }
     }); // iterator value
   }

   function* iteratorFn(task) { // body does not execute until first iterator.next() is called
     task = yield Promise.resolve(); // stops execution
     while(task) {
         task = yield yieldPromise(task); // stop execution
     }
     return Promise.resolve(); // terminates execution
   }
   
	var iterator = iteratorFn(); // creates iterator object
   iterator.next(); // executes iteratorFn body
   return (task) => {
   	var iteratorValue = iterator.next(task); // executes iteratorFn body
      var taskPromise =  iteratorValue.value;
   	return taskPromise;
   };
}

var generateTask = initTaskGenerator(); // init generator
var taskA = generateTask(() => { throw "Task A Failed" }); // creates a promise with error
var taskB = generateTask(() => "Task B Completed"); // creates a promise
var taskC = generateTask([1,2,3,4,5]);
generateTask(); // terminates generator

taskA.then((value) => {
	console.log(value);
});
taskB.then((value) => {
	console.log(value);
});
taskC.then((value) => {
	console.log(value);
});