Scheduler is a Javascipt library to schedule multiple functions using time delay values. It takes an input of array of schedules (object of functions and time delay values) and using setTimeout function, they are executed.

Download the Github repository, extract and use scheduler.js or scheduler.min.js in the project.

Scheduler gets an array of schedules and it returns a function that can be called to execute the schedules.

An optional callback can be passed while calling the function. This callback will execute once the last schedule in the array gets executed.

schedules = Scheduler(schedulesArray[, onSetupCompleteFunction]);
schedules(callback);

schedulesArray is an object containing two properties:

• func: It is a function or an array of functions in a schedule.
• time: It is the optional value of time delay. When this value is omitted it takes the time value of the previous schedule in the list.

let Schedules = Scheduler([
  { 
    func: () => { console.log("function 1"); },
    time: 1000 
  },
  { 
    // an array of functions; they execute together
    func: [  
      () => { console.log("function 2"); },
      () => { console.log("function 3"); }
    ]
  }
], 
() => {
  console.log("Schedules have been made.");
});

let Schedules = Scheduler([
  { 
    func: () => { console.log("function 1"); }, 
    time: 1000 
  },
  { 
    func: [
      () => { console.log("function 2"); },
      Scheduler([  // nested Schedules are also possible
        { 
          // this function executes after the parent function is executed
          func: () => { console.log("function 3"); } 
        }
      ])
    ]
  }
]);