Async/Await
What is it?
Async/await is modern JavaScript syntax for handling asynchronous operations in a more readable, synchronous-looking way. Functions marked with async automatically return Promises, and the await keyword pauses execution until a Promise resolves. This eliminates deeply nested callback functions (callback hell) and makes asynchronous code much easier to write, read, and debug.
Practical example
Instead of chaining multiple .then() calls, you write cleaner code: async function fetchUserData(userId) with try/catch for error handling. Inside, you await fetch to get the response, await response.json() to parse it, then await another fetch for related data. Each line executes in order, making the flow easy to follow, while errors are caught in a single catch block.
Test your knowledge
What must a function be declared as to use await inside it?