css3 怎么实现锯齿状的剪纸效果（如图）

Question

Answer 1

1. Use picture material for border, border-imgae
2. Use linear-gradient, please refer to here http://jsfiddle.net/huanmie913/dyjQc/css3background/

Answer 2

Using blended materials border-image

Answer 3

I’m not sure about this. I only know that it has jagged edges, but it’s different from this