如何实现background-image偶数行右移并创建棋盘格样式？

我尝试用background-image属性给div设置重复背景，代码如下：

.square {
    width: 1000px;
    height: 1000px;
    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="100" height="40"><image width="40" height="40" xlink:href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAYAAACM/rhtAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAFVJREFUeNrs2EENgEAQBMGBoOOsgLQTgaB1dV9Cggf2Ua2g3r2te5xJrvSsjg83mwLnnuYBAgICAgICAgICAgICAgICAgICAgIC/tV7+St9L389AgwA9YgGfH7VrXwAAAAASUVORK5CYII=" /></svg>');
    background-repeat: repeat;
}

但得到的是垂直对齐的图案，我想让偶数行向右偏移一段距离，避免垂直对齐。试了下面的代码，没用：

.square:nth-child(even) {
    background-size: 10px right;
}

更新尝试 #

我想做类似棋盘格的效果，试了双背景图的写法，不重复时能看到效果，但设置background-repeat: repeat后就不对了：

.container {
    width: 1000px;
    height: 1000px;
    margin:0;

    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="100" height="40"><image width="40" height="40" xlink:href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAYAAACM/rhtAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAFVJREFUeNrs2EENgEAQBMGBoOOsgLQTgaB1dV9Cggf2Ua2g3r2te5xJrvSsjg83mwLnnuYBAgICAgICAgICAgICAgICAgICAgIC/tV7+St9L389AgwA9YgGfH7VrXwAAAAASUVORK5CYII=" /></svg>'), url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="100" height="40"><image width="40" height="40" xlink:href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAYAAACM/rhtAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAFVJREFUeNrs2EENgEAQBMGBoOOsgLQTgaB1dV9Cggf2Ua2g3r2te5xJrvSsjg83mwLnnuYBAgICAgICAgICAgICAgICAgICAgIC/tV7+St9L389AgwA9YgGfH7VrXwAAAAASUVORK5CYII=" /></svg>');
    background-repeat: repeat;
    background-position: left 40px top, left 40px;
}

<div class='container'></div>

有效解决方案 #

要实现偶数行偏移的重复背景，核心是调整背景的平铺间距和错位定位，以下两种方法均可实现：

方法一：修改SVG背景单元，包含错位行 #

直接把两行图案（一行正常、一行偏移）整合到一个SVG背景单元中，重复平铺时自然形成错位效果：

.container {
    width: 1000px;
    height: 1000px;
    margin: 0;
    /* SVG包含两行：第一行左对齐，第二行右移40px */
    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="100" height="80"><image width="40" height="40" xlink:href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAYAAACM/rhtAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAFVJREFUeNrs2EENgEAQBMGBoOOsgLQTgaB1dV9Cggf2Ua2g3r2te5xJrvSsjg83mwLnnuYBAgICAgICAgICAgICAgICAgICAgIC/tV7+St9L389AgwA9YgGfH7VrXwAAAAASUVORK5CYII=" /><image width="40" height="40" x="40" y="40" xlink:href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAYAAACM/rhtAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAFVJREFUeNrs2EENgEAQBMGBoOOsgLQTgaB1dV9Cggf2Ua2g3r2te5xJrvSsjg83mwLnnuYBAgICAgICAgICAgICAgICAgICAgIC/tV7+St9L389AgwA9YgGfH7VrXwAAAAASUVORK5CYII=" /></svg>');
    background-repeat: repeat;
}

该方法仅需一个背景图，平铺逻辑简单，浏览器渲染效率高。

方法二：双背景层错位平铺 #

利用两个背景层分别控制奇数行和偶数行的位置，通过background-position和background-size配合实现错位：

.container {
    width: 1000px;
    height: 1000px;
    margin: 0;
    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="100" height="40"><image width="40" height="40" xlink:href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAYAAACM/rhtAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAFVJREFUeNrs2EENgEAQBMGBoOOsgLQTgaB1dV9Cggf2Ua2g3r2te5xJrvSsjg83mwLnnuYBAgICAgICAgICAgICAgICAgICAgIC/tV7+St9L389AgwA9YgGfH7VrXwAAAAASUVORK5CYII=" /></svg>'),
        url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="100" height="40"><image width="40" height="40" xlink:href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAYAAACM/rhtAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAFVJREFUeNrs2EENgEAQBMGBoOOsgLQTgaB1dV9Cggf2Ua2g3r2te5xJrvSsjg83mwLnnuYBAgICAgICAgICAgICAgICAgICAgIC/tV7+St9L389AgwA9YgGfH7VrXwAAAAASUVORK5CYII=" /></svg>');
    background-repeat: repeat;
    /* 第一个背景层：奇数行正常位置 */
    background-position: 0 0;
    /* 第二个背景层：偶数行向下偏移40px（行高），向右偏移40px */
    background-position: 40px 40px;
    /* 确保两个背景层的平铺尺寸一致 */
    background-size: 100px 80px;
}

关键是将background-size设为两行的高度（80px），让两个背景层的平铺周期匹配，避免错位后出现重叠混乱。

内容的提问来源于stack exchange，提问作者Slim