Why Promise.all() Is Dangerous 😳 #coding #react #javascript #programming #js

Added: 2026-06-01

[00:00:00]Most developers use promise all for multiple API calls, but there's a huge problem.

[00:00:06]If just one promise fails, everything fails.

[00:00:10]Look at this.

[00:00:11]We have three API requests. Two are successful and one returns an error.

[00:00:16]Now with promise all, the moment one promise fails, JavaScript jumps directly to catch, which means you lose all successful results, too.

[00:00:26]That's risky for real applications.

[00:00:28]Now here's the smarter solution.

[00:00:30]Promise all settled.

[00:00:32]Instead of stopping everything, it waits for all promises to finish.

[00:00:36]Then it returns fulfilled promises, rejected promises, and their status separately, which means your app still gets usable data even if one request fails.

[00:00:46]This is super useful for dashboards, parallel API calls, analytics, large React apps.

[00:00:53]Comment below. Would you use promise all settled in your next project?