JavaScript Promises Explained With V8 Source Code 🚀 | JS Promise - Part 2

In this video, you’ll learn how JavaScript Promises work from the inside out. 📚 What you’ll learn: JavaScript Promise basics Call Stack, Event Loop & Microtask Queue How .then() works What resolve() actually does Promise execution flow step by step Exploring the V8 engine source code Reading the Promise implementation in Torque How FulfillPromise() and TriggerPromiseReactions() work ⏱️ Timestamps 00:00 Intro 00:23 JavaScript, Browser & Node.js Environment Overview 02:09 Executor Function Runs Immediately 03:39 How .then() Works 05:08 How the Event Loop Checks the Call Stack & Queues 05:47 resolve() Is Called → Value Is Stored in the Promise 08:07 MDN Documentation Promise.all(), Promise.allSettled(), Promise.any() & Promise.race() 09:57 Exploring the Official V8 GitHub Repository 18:26 Outro & Subscribe If you’ve ever wanted to understand Promises beyond just using them, this video is for you. 👍 Like, 💬 Comment, and 🔔 Subscribe for more deep JavaScript and V8 internals.