Event loop investigation

Briefing

Synchronous code, microtasks and tasks all end up running on the same thread. What decides the order, and where exactly does rendering fit?

One call stack, two queues and a rule about when the browser is allowed to breathe.

Laboratory

JavaScript Lab

Level

ENGINEER

Estimated time

12 minutes

Method

simulation

Variables under observation

event loopcall stackmicrotask queuetask queuerendering opportunity