🔰event dispatching

🚧 under construction -> cancellable events

browser ⟩ event ⟩ dispatch

⭐️ 重點

return value of EventTarget ⟩ .dispatchEvent(event)

• false

  • if event is cancelable, and

  • at least one of the event's handlers called .preventDefault().

• true, otherwise.

👥 相關

• the return value of an event handler is related to canceling the default actions.

💈範例

• hide or not to hide?

📘 手冊

• EventTarget ⟩ .dispatchEvent()

• Event ⟩ .preventDefault()