https://github.com/Asabeneh/30-Days-Of-JavaScript/blob/master/18_Day_Promises/18_day_promises.md

• Promises are useful when performing a single asynchronous task
• Promises are based on resolve and reject, if it resolves the .then executes, if it rejects we .catch the error
• Some APIs already have in-built promises as the the fetch API allowing to directly use .then and .catch
• Async/Await : async make the function a promise, two blocks similar as resolve and reject : try and catch, we put the await in the try block, await allows to wait for the execution of a function before performing a task

Vanilla Javascript