JavaScript Event Loop: The Truth About setTimeout(0)
The Real Order of Operations:
1. Call Stack: Synchronous code (A, D) - This is where JavaScript executes code sequentially, like reading a noscript.
2. Microtasks: Promises (C) - These are small tasks that need to be executed ASAP after the current noscript, before the next rendering. Think of them as urgent side tasks.
3. Macrotasks: Timeouts/Intervals (B) - These are longer tasks that the browser queues up to do whenever it gets a chance. They're not as urgent as microtasks.
Golden Rule: "0ms" doesn't mean immediate - it means "next event loop tick".
The Real Order of Operations:
1. Call Stack: Synchronous code (A, D) - This is where JavaScript executes code sequentially, like reading a noscript.
2. Microtasks: Promises (C) - These are small tasks that need to be executed ASAP after the current noscript, before the next rendering. Think of them as urgent side tasks.
3. Macrotasks: Timeouts/Intervals (B) - These are longer tasks that the browser queues up to do whenever it gets a chance. They're not as urgent as microtasks.
Golden Rule: "0ms" doesn't mean immediate - it means "next event loop tick".
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