A Promise is an object that returns a value which you hope to receive in future but not now
                        
Js is always sync and single-threaded. It means JS never wait for code or function result when they take
                            some time, JS direct execute next code.
                        
1. Producing code. -> fetch
                        
Assuming code -> .then / .catch / .finally
                    
                    

                        
Works on condition where more than one promises are working together.
                        

                            
1. Promise.all -> all promises fail if one fails
                            
2. Promise.allsettled -> which promises are pass and which are fails 
                            
3. Promise.race -> give the result of promise which complete first.
                        
                    
                
            

                
Console