Cugbmao's BlogCSS 实现特殊形状
平行四边形
transform实现
可能第一反应会是使用transform，或者叠加三角形，可能更粗暴的方案是直接使用背景图。
以上方法确实可以实现平行四边形，例如下面使用
transform: skew(-30deg);的实现：
但是如果里面里面有文字，需要按照形状进行正常排版，那么这样就无法满足了。当然如果就是需要斜着的文字就另当别论了。
如果要文字正常显示，可以使用伪元素，如下：
但是这样文字实际并没有按照平行四边形进行排版，如果要按照特殊性状进行排版，则需要使用到
shape-outside和clip-path这两个属性了。
shape-outside和clip-path实现
shape-outside定义了一个可以是非矩形的形状，相邻的内联内容应围绕该形状进行包装。默认情况下，内联内容包围其边距框; shape-outside 提供了一种自定义此包装的方法，可以将文本包装在复杂对象周围而不是简单的框中。
语法
css
/* Keyword values */
shape-outside: none;
shape-outside: margin-box;
shape-outside: content-box;
shape-outside: border-box;
shape-outside: padding-box;
/* Function values */
shape-outside: circle();
shape-outside: ellipse();
shape-outside: inset(10px 10px 10px 10px);
shape-outside: polygon(10px 10px, 20px 20px, 30px 30px);
shape-outside: path(
"M0.5,1 C0.5,1,0,0.7,0,0.3 A0.25,0.25,1,1,1,0.5,0.3 A0.25,0.25,1,1,1,1,0.3 C1,0.7,0.5,1,0.5,1 Z"
);
/* <url> value */
shape-outside: url(image.png);
/* <gradient> value */
shape-outside: linear-gradient(45deg, rgba(255, 255, 255, 0) 150px, red 150px);
/* Global values */
shape-outside: inherit;
shape-outside: initial;
shape-outside: revert;
shape-outside: revert-layer;
shape-outside: unset;/* Keyword values */
shape-outside: none;
shape-outside: margin-box;
shape-outside: content-box;
shape-outside: border-box;
shape-outside: padding-box;
/* Function values */
shape-outside: circle();
shape-outside: ellipse();
shape-outside: inset(10px 10px 10px 10px);
shape-outside: polygon(10px 10px, 20px 20px, 30px 30px);
shape-outside: path(
"M0.5,1 C0.5,1,0,0.7,0,0.3 A0.25,0.25,1,1,1,0.5,0.3 A0.25,0.25,1,1,1,1,0.3 C1,0.7,0.5,1,0.5,1 Z"
);
/* <url> value */
shape-outside: url(image.png);
/* <gradient> value */
shape-outside: linear-gradient(45deg, rgba(255, 255, 255, 0) 150px, red 150px);
/* Global values */
shape-outside: inherit;
shape-outside: initial;
shape-outside: revert;
shape-outside: revert-layer;
shape-outside: unset;clip-path 使用裁剪方式创建元素的可显示区域。区域内的部分显示，区域外的隐藏。
语法
css
/* Keyword values */
clip-path: none;
/* <clip-source> values */
clip-path: url(resources.svg#c1);
/* <geometry-box> values */
clip-path: margin-box;
clip-path: border-box;
clip-path: padding-box;
clip-path: content-box;
clip-path: fill-box;
clip-path: stroke-box;
clip-path: view-box;
/* <basic-shape> values */
clip-path: inset(100px 50px);
clip-path: circle(50px at 0 100px);
clip-path: ellipse(50px 60px at 0 10% 20%);
clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
clip-path: path(
"M0.5,1 C0.5,1,0,0.7,0,0.3 A0.25,0.25,1,1,1,0.5,0.3 A0.25,0.25,1,1,1,1,0.3 C1,0.7,0.5,1,0.5,1 Z"
);
/* Box and shape values combined */
clip-path: padding-box circle(50px at 0 100px);
/* Global values */
clip-path: inherit;
clip-path: initial;
clip-path: revert;
clip-path: revert-layer;
clip-path: unset;/* Keyword values */
clip-path: none;
/* <clip-source> values */
clip-path: url(resources.svg#c1);
/* <geometry-box> values */
clip-path: margin-box;
clip-path: border-box;
clip-path: padding-box;
clip-path: content-box;
clip-path: fill-box;
clip-path: stroke-box;
clip-path: view-box;
/* <basic-shape> values */
clip-path: inset(100px 50px);
clip-path: circle(50px at 0 100px);
clip-path: ellipse(50px 60px at 0 10% 20%);
clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
clip-path: path(
"M0.5,1 C0.5,1,0,0.7,0,0.3 A0.25,0.25,1,1,1,0.5,0.3 A0.25,0.25,1,1,1,1,0.3 C1,0.7,0.5,1,0.5,1 Z"
);
/* Box and shape values combined */
clip-path: padding-box circle(50px at 0 100px);
/* Global values */
clip-path: inherit;
clip-path: initial;
clip-path: revert;
clip-path: revert-layer;
clip-path: unset;示例