"When promises were introduced natively in JavaScript, it was definitely a game-changer. In a lot of projects, the usage of callbacks was replaced by promises for running asynchronous tasks, and promises became the main alternative to it. Promises resemble callbacks in some ways, but with an easier-to-follow syntax and a better understanding of the code."
"In 2025, JavaScript's async concept has evolved dramatically. With async/await, Promise.allSettled, Promise.any, and the new Array.fromAsync(), developers often wonder whether Promise.all is still worth using. The answer is absolutely yes, but with important caveats."
"Editor's note: This article was last updated in October 2025 to reflect modern JavaScript features introduced since its original publication. It now includes recent developments, such as Array.fromAsync() and revisits how methods like Promise.all, Promise.allSettled, and Promise.any fit into today's async workflows. 🚀 Sign up for The Replay newsletter The Replay is a weekly newsletter for dev and engineering leaders. Delivered once a week, it's your curated guide to the most important conversations around frontend dev, emerging AI tools, and the state of modern software."
Callbacks were widely used for asynchronous tasks before native promises. Promises replaced callbacks in many projects because they offer easier-to-follow syntax and clearer code semantics. JavaScript is single-threaded, so promises represent future results of asynchronous operations. By 2025, async/await, Promise.allSettled, Promise.any, and Array.fromAsync() expanded async tooling. Promise.all remains useful for running multiple tasks in parallel but requires caveats around failure behavior and result handling. Combining Promise.all with modern async patterns enables efficient parallelism when all results are required. Understanding how promises operate is fundamental to using Promise.all correctly.
Read at LogRocket Blog
Unable to calculate read time
Collection
[
|
...
]