Microtasks: Why Promises Run First

📰 Medium · JavaScript

Understand how JavaScript runs microtasks and why promises execute first

intermediate Published 23 Apr 2026
Action Steps
  1. Read the article series on how JavaScript runs
  2. Understand the concept of microtasks in JavaScript
  3. Learn why promises run first in the microtask queue
  4. Apply this knowledge to improve JavaScript code performance
  5. Test and debug JavaScript code using microtasks and promises
Who Needs to Know This

Developers and software engineers working with JavaScript will benefit from understanding microtasks and promise execution

Key Insight

💡 Promises in JavaScript execute before other microtasks

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💡 JavaScript microtasks: promises run first!
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