CSS 溢出-y 属性

原文:https://www.geeksforgeeks.org/css-overflow-y-property/

CSS 的 overflow-y 属性指定内容溢出块级元素的上下边缘时的行为。基于分配给 overflow-y 属性的值，内容可以被剪切、隐藏或相应地显示滚动条。

语法:

overflow-y: scroll | hidden | visible | auto

属性值:

  • Scroll: If the value assigned to the property is “scroll” then the content is clipped to fit the element and a scrollbar is displayed by the browser to help scroll the overflowed content. The scrollbar is added regardless of the content being clipped.

    示例:

    ```html <!DOCTYPE html>

                 CSS overflow-y Property                   .content {             background-color: lightgreen;             height: 100px;             width: 250px;             overflow-y: scroll;         }     

        

    The overflow-y Property

        

            The CSS overflow-y property specifies the         behavior of content when it overflows a          block-level element’s top and bottom edges.         The content may be clipped, hidden or a          scrollbar may be displayed as specified.     

    overflow-y: scroll

             
            GeeksforGeeks is a computer science portal          with a huge variety of well written and          explained computer science and programming         articles,quizzes and interview questions.         The portal also has dedicated GATE preparation         and competitive  programming sections.     
                         ```

    输出 : overflow-y: scroll

  • Hidden: On assigning “hidden” as the value to the property, the content is clipped to fit the element. No scrollbars are provided and the content is hidden.

    示例:

    ```html <!DOCTYPE html>

                 CSS overflow-y Property                   .content {             background-color: lightgreen;             height: 100px;             width: 250px;             overflow-y: hidden;         }          

    The overflow-y Property

        

            The CSS overflow-y property specifies the         behavior of content when it overflows a          block-level element’s top and bottom edges.         The content may be clipped, hidden or a          scrollbar may be displayed as specified.     

    overflow-y: scroll

             
            GeeksforGeeks is a computer science portal          with a huge variety of well written and          explained computer science and programming         articles,quizzes and interview questions.         The portal also has dedicated GATE preparation         and competitive  programming sections.     
                         ```

    输出 : overflow-y: hidden

  • Visible: If the value assigned to the “overflow-y” property is “visible” then the content is not clipped and may overflow out to the top or bottom of the containing element. Example:

    ```html <!DOCTYPE html>

                 CSS overflow-y Property                   .content {             background-color: lightgreen;             height: 100px;             width: 250px;             overflow-y: visible;         }          

    The overflow-y Property

        

            The CSS overflow-y property specifies the         behavior of content when it overflows a          block-level element’s top and bottom edges.         The content may be clipped, hidden or a          scrollbar may be displayed as specified.     

    overflow-y: scroll

             
            GeeksforGeeks is a computer science portal          with a huge variety of well written and          explained computer science and programming         articles,quizzes and interview questions.         The portal also has dedicated GATE preparation         and competitive  programming sections.     
                         ```

    输出 : overflow-y: visible

  • Auto: The behavior of auto depends on the content and scrollbars are added only when the content overflows, unlike that of the scroll value where the scrollbar is added regardless of overflow.

    示例:

    ```html <!DOCTYPE html>

                 CSS overflow-y Property                   .content {             background-color: lightgreen;             height: 100px;             width: 250px;             overflow-y: auto;         }     

        

    The overflow-y Property

        

            The CSS overflow-y property specifies the         behavior of content when it overflows a          block-level element’s top and bottom edges.         The content may be clipped, hidden or a          scrollbar may be displayed as specified.     

    overflow-y: scroll

             
            GeeksforGeeks is a computer science portal          with a huge variety of well written and          explained computer science and programming         articles,quizzes and interview questions.         The portal also has dedicated GATE preparation         and competitive  programming sections.     
                         ```

    输出 : overflow-y: auto

支持的浏览器:overflow-y属性支持的浏览器如下:

  • 铬
  • 微软公司出品的 web 浏览器
  • 火狐浏览器
  • 歌剧
  • 旅行队

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