nodeEventTarget.once(type, listener)

• type <string>
• listener <Function> | <EventListener>
• 返回：<EventTarget> this

Node.js 特定的 EventTarget 类扩展，为给定的事件 type 添加一个 once 监听器。这相当于调用 on 并将 once 选项设置为 true。

🌐 Node.js-specific extension to the EventTarget class that adds a once listener for the given event type. This is equivalent to calling on with the once option set to true.