A guide to async/await in TypeScript

Asynchronous programming in TypeScript, which builds on JavaScript's promise-based model, allows tasks to run independently, enhancing multitasking and efficiency. The article outlines the foundational role of promises, which can be in pending, fulfilled, or rejected states, and how they are manipulated using methods like `.then()` and `.catch()`. It explains the async/await syntax, a syntactic sugar that makes asynchronous code appear synchronous, improving readability and error handling through try/catch blocks. TypeScript's type safety adds value by detecting errors early in development. The article also explores advanced techniques, including concurrent execution using `Promise.all`, handling partial successes with `Promise.allSettled`, and processing data streams with `for await...of`. Additionally, it highlights the integration of higher-order functions for reusable error handling and discusses custom utility functions and the Awaited type for unwrapping resolved promise values. These techniques showcase how async/await can streamline complex asynchronous operations, making code more maintainable and efficient.