html set scroll bar

HTML Set scroll bar

In a web page, if there is too much text content, the page may be unclear or the layout may be confusing. At this time, we need to use scroll bars to help users view all the content on the page. In HTML, we can implement the scroll bar function by setting attributes.

Among them, the two most commonly used attributes are overflow and overflow-x / overflow-y.

1. overflow property

This property determines whether to display scroll bars when the content exceeds the container. It has three values ​​​​that can be used:

• visible: the default value, which means that the scroll bar will not be displayed, but the content will overflow part of the container.
• hidden: Indicates that overflowing content will not be displayed and scroll bars will not be displayed.
• auto: Indicates that the scroll bar will only be displayed when the content overflows the container, otherwise it will not be displayed.

For example:

<div style="width: 200px; height: 100px; overflow: auto;">
  这里是一段很长的内容...
</div>

In this code, the width of the div element is 200px and the height is 100px. When the content exceeds this range, scroll bars will be automatically displayed.

2. overflow-x and overflow-y attributes

In addition to setting the overall scroll bar, we can also set the horizontal and vertical scroll bars respectively. Specific attributes for overflow-x and overflow-y.

The following sample code is shown:

<div style="width: 150px; height: 150px; overflow-x: scroll; overflow-y: hidden;">
 这里是一些很宽的内容...
</div>

In this code, two attributes are used. When the content is too wide, only horizontal scroll bars appear; no vertical scroll bars appear. This ensures that the page has more space to display other content.

In addition, there is a commonly used attribute - overflow-style. It can be used to set the style of the scroll bar, such as borderWidth, color, style, etc. For example, use the following code to change the color of the scroll bar to blue and set the width to 10 pixels:

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
  background-color: #f2f2f2;
}
::-webkit-scrollbar-thumb {
  background-color: #2196F3;
}

In summary, setting up scroll bars using HTML is very simple. By setting the overflow and overflow-x / overflow-y properties, we can easily implement the layout and content display of web pages. Finally, you can make scrollbars more consistent with your branding and coding style by using overflow-style.

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