How does single-threaded JS implement multiple interactions at the same time

Answer: Simulate multi-threading with "rotary time slices" (segments that perform multiple tasks in turn in a short period of time)

Method to realize:

1. Existing task 1, task 2
2. Split task 1 and task 2
3. Randomly arrange these task fragments to form a queue
4. Send the task fragments to the JS engine in this queue order
5. The JS engine executes these task fragments in turn