Asynchronous Operations

• Promises
• Callbacks
• Async/ wait
• Generators with yield
• setTimeout
• setInterval
• Event driven programming

JavaScript is single threaded.

In synchronous communications for a given queue of tasks, the first task finish before the second task starts.

In asynchronous communications tasks are executed in parallel / concurrently.

No blocking

Uses of asynchronous programming

• fetching data from an API

• downloading files

• uploading files

• animations and transitions

• time taking operations

Using Callbacks in fetching API data asynchronously.

Callbacks are functions that passed as arguments to other functions.