无法使用“无"替代背景颜色，只能使用“继承"替代背景颜色. [英] Can't override background color with "none", only with "inherit"

问题描述

我试图从Windows 8 ListView控件中的.win-container元素(图块)中删除白色背景，以使背景完全显示出来.当我追踪样式时，我可以看到白色背景正按照以下规则应用...

I was trying to remove the white background from the .win-container elements (the tiles) in a Windows 8 ListView control to let the background show through. When I traced the styles, I could see that the white background was getting applied with the following rule...

.win-listview :not(.win-footprint).win-container

所以我为此写了自己的规则...

So I wrote my own rule for that like this...

.win-listview :not(.win-footprint).win-container {
    background-color: none;
}

但这没用.

一个朋友帮我弄清楚我可以使用...

A friend helped me figure out that I could use...

.win-listview :not(.win-footprint).win-container {
    background-color: inherit;
}

那很好.谁能告诉我世界上为什么会这样吗?

And that works great. Can anyone tell me why in the world this is so?

推荐答案

none 是 background-image 属性的值，而不是 background-color .由于它不是 background-color 的有效值，因此该声明将被忽略，系统将继续使用默认的白色背景绘制您的图块.如果您想为瓷砖提供透明的背景，则需要使用 background-color:transparent 代替:

none is a value of the background-image property, not background-color. Since it's not a valid value of background-color, the declaration is ignored and the system will continue drawing your tiles with the default white background. If you want to give your tiles a transparent background, you need to use background-color: transparent instead:

.win-listview :not(.win-footprint).win-container {
    background-color: transparent;
}

(您也可以使用 background:none ，但是 none 再次表示 background-image 并隐含 transparent 表示 background-color .)

(You can also use background: none, but again none represents background-image with an implied transparent for background-color.)

背景色:继承只是告诉您要使用的图块(或继承)，其背景颜色与包含它们的 ListView 相同.这可能具有或可能没有明显的背景色的明显效果.但是，它与具有透明背景不同(除非 ListView 本身也具有透明背景，在您的情况下，它可能没有).

background-color: inherit simply tells your tiles to take on (or inherit) the same background color as the ListView containing them. This may or may not have an apparent effect of having no distinct background color. However it is not the same as having a transparent background (unless the ListView itself also has a transparent background, which in your case it probably doesn't).

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