unlink() ↔ fs Static Method to async remove file/Symbolic Link
rmdir() ↔ fs Static Method to async remove dir
rename() ↔ fs Static Method to async rename file (to new path)
mkdir() ↔ fs Static Method to async make new dir
appendFile() ↔ fs Static Method to async append data to file
writeFile() ↔ fs Static Method to async write data to file
readFile() ↔ fs Static Method to async read contents of file
readdir() ↔ fs Static Method to async read dir content
Event-Driven ↔ (model) to listen/respond async events via Callback Function
Promise ↔ Object placeholder for async operation & eventual Settled result
Settled ↔ async task complete
Pending ↔ async task still run in background
.json() ↔ async Chain Method to return Promise parse as JSON format
.then() ↔ async Chain Method to execute Callback on Fullfill, auto-pass Promise Value as arg
Fetch API ↔ Web API to Data Fetch Web Resource via async Promise
useAuth() ↔ async Custom Hook to get Auth state from Backend/Online API
useAsync() ↔ async Custom Hook to return value, error, status of Data Fetch