In Listing 1, the target of the unload event is the body element, and the event handler is the bit of script inside the onunload attribute.

清单1中unload事件的目标是body元素，事件处理程序onunload属性中为数不多的那一点脚本。

youdao

In Listing 1, the target of the unload event is the body element, and the event handler is the bit of script inside the onunload attribute.

清单1中unload事件的目标是body元素，事件处理程序onunload属性中为数不多的那一点脚本。

youdao