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HomeWeb Front-endCSS TutorialCSS example code for setting scroll bar style

This article mainly introduces the example code of CSS setting scroll bar style. It is very good and has certain reference value. Friends who need it can refer to it

The implementation code of CSS setting scroll bar style is as follows Representation:

•::-webkit-scrollbar The whole part of the scroll bar
•::-webkit-scrollbar-thumb The small square inside the scroll bar can move up and down (or left and right) , depending on whether it is a vertical scroll bar or a horizontal scroll bar)
•::-webkit-scrollbar-track The track of the scroll bar (with Thumb inside)
•::-webkit-scrollbar-button The track of the scroll bar Buttons at both ends allow fine-tuning the position of the small squares by clicking on them.
•::-webkit-scrollbar-track-piece The inner track, the middle part of the scroll bar (removed)
•::-webkit-scrollbar-corner The corner, that is, the intersection of the two scroll bars
•::-webkit-resizer A small control at the intersection of two scroll bars for resizing elements by dragging

/*定义滚动条高宽及背景 高宽分别对应横竖滚动条的尺寸*/
::-webkit-scrollbar
{
    width: 16px;
    height: 16px;
    background-color: #F5F5F5;
}
/*定义滚动条轨道 内阴影+圆角*/
::-webkit-scrollbar-track
{
    -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
    border-radius: 10px;
    background-color: #F5F5F5;
}
/*定义滑块 内阴影+圆角*/
::-webkit-scrollbar-thumb
{
    border-radius: 10px;
    -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);
    background-color: #555;
}

Details Setting

To define scroll bars is to use pseudo-elements and pseudo-classes. So what are pseudo-elements and pseudo-classes?

Everyone should be familiar with pseudo-classes: link, :focus, :hover. In addition, many pseudo-class selectors have been added to CSS3, such as :nth-child, :last-child, :nth-last-of -type() etc.

You have seen the pseudo elements in CSS before: :first-line, :first-letter, :before, :after. Then in CSS3, the pseudo-element has been adjusted, and a ":" has been added to the previous one, which is now "::first-letter,::first-line,::before,::after", In addition, CSS3 also adds a "::selection". Two "::" and one ":" are mainly used in CSS3 to distinguish pseudo-classes and pseudo-elements.

Webkit’s implementation of pseudo-classes and pseudo-elements is very strong. You can define the scroll bar as a page element, and then combine it with some advanced CSS3 attributes, such as gradients, rounded corners, RGBa, etc. Then if you need to use images in some places, you can also convert the images to Base64, otherwise you have to load multiple images every time and increase the number of requests.

Any object can be set: borders, shadows, background images, etc. The created scroll bar will still complete its interactive behavior according to the settings of the operating system itself. The following pseudo-classes can be applied to the above pseudo-elements. It's a bit complicated. For details on how to write it, you can see the first demo. There are also comments there.

:horizontal
//horizontal伪类适用于任何水平方向上的滚动条
:vertical
//vertical伪类适用于任何垂直方向的滚动条
:decrement
//decrement伪类适用于按钮和轨道碎片。表示递减的按钮或轨道碎片,例如可以使区域向上或者向右移动的区域和按钮
:increment
//increment伪类适用于按钮和轨道碎片。表示递增的按钮或轨道碎片,例如可以使区域向下或者向左移动的区域和按钮
:start
//start伪类适用于按钮和轨道碎片。表示对象(按钮 轨道碎片)是否放在滑块的前面
:end
//end伪类适用于按钮和轨道碎片。表示对象(按钮 轨道碎片)是否放在滑块的后面
:double-button
//double-button伪类适用于按钮和轨道碎片。判断轨道结束的位置是否是一对按钮。也就是轨道碎片紧挨着一对在一起的按钮。
:single-button
//single-button伪类适用于按钮和轨道碎片。判断轨道结束的位置是否是一个按钮。也就是轨道碎片紧挨着一个单独的按钮。
:no-button
no-button伪类表示轨道结束的位置没有按钮。
:corner-present
//corner-present伪类表示滚动条的角落是否存在。
:window-inactive
//适用于所有滚动条,表示包含滚动条的区域,焦点不在该窗口的时候。
::-webkit-scrollbar-track-piece:start {
/*滚动条上半边或左半边*/
}
::-webkit-scrollbar-thumb:window-inactive {
/*当焦点不在当前区域滑块的状态*/
}
::-webkit-scrollbar-button:horizontal:decrement:hover {
/*当鼠标在水平滚动条下面的按钮上的状态*/
}

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