如何理解规范的事件循环中未由任务队列调度的事件？

Question

In the spec :

Not all events are dispatched using the task queue, many are dispatched during other tasks.

I want to know the "many" and the "other tasks" above refer to what?

Answer 1

If you search the HTML spec for the phrase “fire an event” , you'll see cases it says “queue a task to fire an event” and places it just says ”fire an event“ without “queue a task” . For example :

Each document has a current document readiness . … When the value is set, the user agent must fire an event named readystatechange at the Document object .

Compare that language above to the language in the following spec excerpt :

… the user agent must, if the loads were successful, queue a task to fire an event named load at the link element …

So when the spec instead of saying “queue a task to fire an event” just says “fire an event”, then the event doesn't go into the task queue but instead must essentially be fired synchronously.