The required attribute is used during form validation (more on that below) and the autofocus attribute lets you pick the element on the page too get focus.

required属性用于表单验证(下面将详细介绍)过程中，autofocus属性允许选择页面上的元素以获取焦点。

youdao

The required attribute is used during form validation (more on that below) and the autofocus attribute lets you pick the element on the page too get focus.

required属性用于表单验证(下面将详细介绍)过程中，autofocus属性允许选择页面上的元素以获取焦点。

youdao