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JeOam/macrotask.md

Created October 15, 2017 07:34
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macrotask vs microtask
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macrotask.md

一个事件循环(EventLoop)中会有一个正在执行的任务(Task)，而这个任务就是从 macrotask 队列中来的。在whatwg规范中有 queue 就是任务队列。当这个 macrotask 执行结束后所有可用的 microtask 将会在同一个事件循环中执行，当这些 microtask 执行结束后还能继续添加 microtask 一直到真个 microtask 队列执行结束。

  • macrotasks: setTimeout setInterval setImmediate I/O UI渲染
  • microtasks: Promise process.nextTick Object.observe MutationObserver

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JeOam commented Oct 15, 2017

Difference between microtask and macrotask within an event loop context

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