是否可以在CSS中使用CSS [英] Is it possible to have a CSS within a CSS

问题描述

我正在网站上工作，而且我对级联样式表的功能感到好奇。我有一个图像，当用户将鼠标悬停时，我希望其他元素出现在它上面。

例如一个普通的图像，当用户将鼠标悬停在它上面时，我想在其上显示两个按钮

I am working on a site and I''m curios on the functionality of cascade style sheets. I have an image and I want other elements to appear on it when the user hovers.
e.g. A plain image, when user hovers over it I want to display two buttons on it

.image
    {
    background image: url;
    }

.image:hover
    {
    .buttonNext
        {
        backgroun-image: url;
        margin: 5px;
        }

    .buttonPrevious
        {
        backgroun-image: url;
        margin: 10px;
        }
    }

这甚至是可能还是我应该研究CSS嵌套和分组？

Is this even possible or should I look into CSS nesting and grouping?

推荐答案

不，这不是怎么回事CSS是专门设计的。



是的，它们是级联的，但不是这种意义上的。 CSS样式只放在一个扁平的单级列表中。



Cascadeness来自HTML中的元素层次结构，它们的父子关系，而不是CSS。一个基本原则是：父继承：如果未指定属性，它将从父元素继承。你能看出它是如何由于这个事实而级联的吗？您可以在此处找到关于样式优先级方案的其他详细信息： http：// en。 wikipedia.org/wiki/CSS#CSS_Priority_scheme_.28highest_to_lowest.29 [ ^ ]。

-SA

No, this is not how CSS is designed.

Yes, they are cascade, but not in this sense. CSS styles are put just in a flat single-level list.

"Cascadeness" comes from the hierarchy of elements in HTML, their parent-child relationship, not CSS. One basic principle is this: "Parent inheritance: If a property is not specified, it will be inherited from a parent element". Can you see how it cascades due to this fact? You can find other detail on style priority scheme here: http://en.wikipedia.org/wiki/CSS#CSS_Priority_scheme_.28highest_to_lowest.29[^].

—SA

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