.NET Rocks! Javascript Promises with Martine Dowden
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Mar 27, 2025 Martine Dowden, an award-winning CTO and UX/UI expert, dives into the fascinating world of JavaScript promises. She explains the power of async programming, showcasing tools like Callbacks, Promises, and Async/Await. Martine shares intriguing features such as grouping sync calls and the race condition that favors rapid completion. With her insights, developers can navigate the complexities of asynchronous code and enhance user interfaces effectively. Plus, she reveals common pitfalls and offers strategies to manage errors in networking scenarios.
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Promises handle async operations
- JavaScript promises, often used with
fetch, handle asynchronous operations. - They allow chaining operations with
.thenand don't always require returning a promise.
Using Promise.all
- Use
Promise.allfor multiple fetches that must all return before proceeding. - If one fails, all fail, which can be advantageous depending on the use case.
Parallel fetches
- For parallel, independent fetches, use separate functions or chain
.thencalls. - Avoid
async/awaitin this case, as it enforces sequential execution.