In the oldest browser the event handler is only accessible through HTML attributes in the source code of the page.

在最早的浏览器理，事件处理器只能从网页源码中html里面的属性进入。

youdao

In the oldest browser the event handler is only accessible through HTML attributes in the source code of the page.

在最早的浏览器理，事件处理器只能从网页源码中html里面的属性进入。

youdao