你可以使用overflow-y: scroll进行垂直滚动。

<div style="overflow-y:scroll; height:400px; background:gray"> Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. </div>

您可以使用这段代码。

<div id="" style="overflow-y:scroll; overflow-x:hidden; height:400px;">

overflow-x: The overflow-x property specifies what to do with the left/right edges of the content - if it overflows the element's content area. overflow-y: The overflow-y property specifies what to do with the top/bottom edges of the content - if it overflows the element's content area. Values visible: Default value. The content is not clipped, and it may be rendered outside the content box. hidden: The content is clipped - and no scrolling mechanism is provided. scroll: The content is clipped and a scrolling mechanism is provided. auto: Should cause a scrolling mechanism to be provided for overflowing boxes. initial: Sets this property to its default value. inherit Inherits this property from its parent element.

对于100%视口高度使用:

overflow: auto;
max-height: 100vh;

我在代码中添加了一些注释用于解释。这里有一些参考:https://www.w3schools.com/css/css_overflow.asp

div { overflow-y: auto; /* the auto value is similar to scroll, but it adds scrollbars only when necessary */ word-break: keep-all; /* this is optional, so the words keep in one line */ white-space: nowrap; /* this is optional, so the div can expands to the side */ } <div> Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. </div>

试试这样。

< span style=" font - family:宋体;身高:400 px;" >

参考这个要点:https://gist.github.com/zeoneo/5f9fff92a12aa6d9d42065b5df68e9d5

它可能会帮助您创建一个使用flex和具有自滚动分割窗格的布局。

body { background-color: aquamarine; margin: 0; padding: 0; } .container { height: 100vh; display: flex; flex-direction: column; background-color: bisque; } .left { width: 300px; background-color: lightblue; overflow: auto; scroll-behavior: smooth; } .right { flex:1; background-color: lightcoral; overflow: auto; scroll-behavior: smooth; } .sidebar-item { display: block; height: 100px; background-color: lightseagreen; margin: 5px; } .header { display: block; height: 100px; flex:none; background-color: aqua; } .content { flex:1; background-color: brown; display: flex; overflow: auto; } <html> <head> <title>Hello World</title> </head> <body> <div class="container"> <div class="header"> Header </div> <div class="content"> <div class="left myscroll"> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> </div> <div class="right"> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> <div class="sidebar-item"></div> </div> </div> </div> </body> </html>