处理重复背景图像之间的空间？

Question

我的div元素大小为200 x 200。

我在右侧的元素中添加了背景图片。

div {
    background-image: url('./images/dot.png');
    background-position: right;
    background-repeat: repeat-y;
}

很好地重复。但我想控制重复图像之间的空间。我想在重复图像之间添加20px的空间。我怎样才能做到这一点？请帮帮我？

修改

我需要添加尽可能多的空间。如果我使用background-repeat: space我只获得一些空间，但它可能不是10px或20px或30px。我想添加特定的大小（具体数量）。

Answer 1

以this为基础回答。

假设我们有一个苹果形象：

步骤1.将此图像转换为Base64

例如，你会得到

data:image/jpeg;base64,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

步骤2：将此Base64插入SVG

'data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="50" height="40"><image width="40" height="40" xlink:href="[paste it here]" /></svg>');

第3步：将其复制到CSS background-image

要获得10px空格，我们的CSS背景图片宽度为50px，svg的40px代码为image，50 – 40 = 10 px。

body {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="50" height="40"><image width="40" height="30" xlink:href="data:image/jpeg;base64,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" /></svg>');
}

步骤4.如果需要IE / Edge支持

IE / Edge已关注bug：

  

这是IE / Edge和基于Webkit的浏览器之间的长期差异，它们几乎不需要在SVG数据uris中转义任何值，并且我们要求“utf8”之后的整个值完全转义。同时，您可以使用javascript内置的转义功能轻松完成此操作。这个值今天适用于所有浏览器。

为了使其工作，请将此SVG用作外部文件，或在<svg>…</svg>中转义background-image部分。例如，使用此CodePen。

更新

如果您希望图片与图片和40px之间的background-repeat: repeat-y空间对齐，则需要将SVG高度设置为70px（图片高度为30px时）。这是演示：

body {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="40" height="70"><image width="40" height="30" xlink:href="data:image/jpeg;base64,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" /></svg>');
    background-repeat: repeat-y;
    background-position: right top;
}