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The article provides a comprehensive overview of JavaScript Promises, explaining their purpose in handling asynchronous operations. It details how Promises work, including their states and methods, and offers practical examples for better understanding their implementation in coding practices.
The article delves into the inner workings of Node.js, explaining its event-driven architecture and non-blocking I/O model. It highlights how Node.js handles asynchronous operations, enabling high scalability for web applications. Additionally, it discusses the role of the V8 engine in executing JavaScript code efficiently.
Top-level await, introduced in ES2022, allows developers to use the await keyword at the top level of ES modules, simplifying asynchronous code by eliminating the need for wrapping it in async functions. This feature enhances code readability and streamlines the execution of asynchronous logic, although it introduces potential issues like circular dependencies and blocking module imports. Best practices suggest using top-level await judiciously, particularly in non-shared modules, to avoid performance pitfalls.