Creating a promise

Simple Example

function onSuccess(){
  console.log('Success ✌️')
}

function onError(){
  console.log('Error 💩')
}

var promise = new Promise((resolve, reject)=>{
  resolve(); // will execute the On success method
  reject(); // will execute the On Error method
}, 400)

promise.then(onSuccess)
promise.catch(onError)