处理enter键：取消Add按钮，通过检查textarea的onkeydown事件看看用户是否按下了Enter或return键。

Handle the Enter key: Instead of having an Add button, watch for users pressing the Enter or Return key by hooking onto the onkeydown event in the textarea.

youdao

处理enter键：取消Add按钮，通过检查textarea的onkeydown事件看看用户是否按下了Enter或return键。

Handle the Enter key: Instead of having an Add button, watch for users pressing the Enter or Return key by hooking onto the onkeydown event in the textarea.

youdao