聊天气泡小角实现
可以由两种实现的方式
- canvas，绘制路径，然后再clip图片,本文暂不描述
- 另一种就是利用css3的新属性clip-path属性，绘制出要切割的路径，然后再给clip-path属性赋值,火狐和IE未实现此属性
Can I use: https://caniuse.com/#search=css%20clip
/* Keyword values */
clip-path: none;
/* Image values */
clip-path: url(resources.svg#c1);
/* Box values */
clip-path: fill-box;
clip-path: stroke-box;
clip-path: view-box;
clip-path: margin-box;
clip-path: border-box;
clip-path: padding-box;
clip-path: content-box;
/* Geometry values */
clip-path: inset(100px 50px);
clip-path: circle(50px at 0 100px);
clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
/* Box and geometry values combined */
clip-path: padding-box circle(50px at 0 100px);
/* Global values */
clip-path: inherit;
clip-path: initial;
clip-path: unset;