Promise ↔ Object placeholder for async operation & eventual Settled result

container for async delivered value

container for a future value

proxy for unknown value from async action, used to defer return value (success or fail) to future

Promise Lifecycle

(model) Promise process to start as Pending & end Settled into Fullfill || Reject

Promise Combinator

Promise.all()

Promise.race()

to set Race Condition to return first Promise to Settled

Promise.any()

Promise.allSettled()

References

1. Fetch API ↔ Web API to Data Fetch Web Resource via async Promise

2. Promise Lifecycle ↔ (model) Promise process to start as Pending & end Settled into Fullfill || Reject

3. Consume ↔ (process) to use Settled Promise to get a result

4. await ↔ JS Keyword to suspend execute JS code portion until Promise Settled & returns result

5. async function ↔ JS Keyword to Declare function with Asynchronous Code to return Promise & allow await inside

6. .json() ↔ async Chain Method to return Promise parse as JSON format

7. import() ↔ JS Operator to Dynamically load Module via Promise

8. Promise.race() ↔ to set Race Condition to return first Promise to Settled

9. .then() ↔ async Chain Method to execute Callback on Fullfill, auto-pass Promise Value as arg

10. .catch() ↔ Chain Callback to handle Promise Error propagation

11. fs-extra ↔ Node Lib extends fs with Promise-based functions that cut down on Boilerplate