Javascript Async

Javascript is a single-threaded, non-blocking, asynchronous programming language.

What is the problem with synchronous code?

• Code is executed line by line
• CallStack example.
• counter.html
• quote.html
• SyncFetch example.

Event Loop

• SetTimeout example.
• Loupe

Callbacks

• AsyncFetch example.
• square.html
• AsyncSquare example.

Promises

• PromisesSquare example.

Async/Await

• AsyncAwaitSquare example.
• Looking back at SyncSquare example.

Error Handling

• PromiseCatch example.

Resources

• JSConf Event Loop
• Loupe
• Understanding the Event Loop, Callbacks, Promises, and Async/Await in JavaScript